2008 Mercedes-benz M Class Owners Manual

Warning!

For safety reasons, switch off wipers and re- move SmartKey from starter switch (vehicles with KEYLESS-GO*: Make sure the vehicle’s on-board electronics have status 0) before cleaning the windshield and/or the wiper blades. Otherwise, the wiper motor could suddenly turn on and cause injury.

왘 Fold the wiper arms forward until they

engage.

! Do not pull on the wiper blade inserts. They could tear. 왘 Clean the wiper blade inserts with a

clean cloth and detergent solution.

395

Operation Vehicle care

Light alloy wheels If possible, clean wheels once a week. 왘 Use Mercedes-Benz approved Wheel Care, a soft bristle brush and a strong spray of water for cleaning the light al- loy wheels.

! Only use acid-free cleaning materials. Acid may cause corrosion or damage the clear coat.

! The vehicle should not be parked for an ex- tended period of time immediately after it has been cleaned, especially not after the wheel rims have been cleaned with wheel rim cleaner. Wheel rim cleaners can lead to increased corrosion of the brake disks and brake pads. Non-approved wheel cleaners may also damage the wheel paint if the car is not driven after cleaning. Therefore, the vehicle’s brake system should always be warmed-up before it is parked after cleaning. To do so, please drive your vehicle for several minutes to allow the brakes to dry. When applying Mercedes-Benz approved Tire Care and Mercedes-Benz approved Wheel Care products, take care not to spray them on the brake disks.

396

Plastic and rubber parts 왘 Use a gentle dishwashing detergent or mild detergent for delicate fabrics as a washing solution.

왘 Wipe with a cloth moistened in a

lukewarm solution. The surface may temporarily change color. If this is the case, wait for it to dry.

Warning!

Do not use cleaners or cockpit care sprays containing solvents to clean the cockpit or the steering wheel. Cleaners containing sol- vents will make the surface porous and vehi- cle occupants could suffer serious injuries from plastic parts coming loose in the event of air bag deployment.

! Do not use oil, wax or scouring agents on these parts. Never apply strong force and only use a soft, non-scratching cloth when cleaning the surface. Do not attempt to wipe the surface with a dry cloth or sponge. Otherwise you may scratch or damage the surface.

Hard plastic trim items 왘 Use Mercedes-Benz approved Interior Care, a soft, lint-free cloth and apply with light pressure.

! Never apply strong force and only use a soft, non-scratching cloth when cleaning the surface. Do not attempt to wipe the surface with a dry cloth or sponge. Otherwise you may scratch or damage the surface.

Steering wheel 왘 Wipe with a damp cloth and dry thor- oughly or clean with Mercedes-Benz approved Leather Care.

Carpets 왘 Use Mercedes-Benz approved Carpet and Fabric Care for cleaning the car- pets.

Headliner 왘 Use a soft bristle brush or a

dry-shampoo cleaner in case of excessive dirt.

Operation Vehicle care

Seat belts 왘 Only use clear, lukewarm water and

soap.

! The seat belts must not be treated with chemical cleaning agents. Do not dry the seat belts at temperatures above 176°F (80°C) or in direct sunlight.

Upholstery Using aftermarket seat covers or wearing clothing that have the tendency to give off coloring (e.g. when wet, etc.) may cause the upholstery to become permanently dis- colored. By lining the seats with a proper intermediate cover, contact-discoloration will be prevented.

Warning!

Warning!

Do not bleach or dye seat belts as this may severely weaken them. In a crash they may not be able to provide adequate protection.

Only use seat or head restraint covers which have been tested and approved by Mercedes-Benz for your vehicle model. Using other seat or head restraint covers may interfere with or prevent 앫 deployment of the front side impact air

bags

앫 deployment of the rear side impact air

bags*

앫 activation of the active head restraints Contact an authorized Mercedes-Benz Light Truck Center for availability.

397

MB Tex upholstery 왘 Use Mercedes-Benz approved Interior

Care onto a soft, lint-free cloth and apply with light pressure for cleaning the upholstery.

Wood trims 왘 Dampen cloth using water and use

damp cloth to clean wood trims in your vehicle.

! Do not use solvents like tar remover or wheel cleaner nor polishes or waxes as these may be abrasive.

Operation Vehicle care

Leather upholstery* Please not that leather upholstery is a natural product and is therefore subject to a natural aging process. Leather upholstery may also react to certain ambient influences such as high humidity or high temperature by showing wrinkles for example. 왘 Wipe leather upholstery with a damp cloth and dry thoroughly or clean with Mercedes-Benz approved Leather Care.

! To avoid damage to leather upholstery: 앫 Wipe with light pressure only. 앫 Do not clean with abrasive cleaning agents

such as scouring milk or powder.

앫 Do not soak the leather upholstery.

As leather is a natural product, it could otherwise harden or become porous.

앫 Exercise particular care when cleaning

perforated leather as its underside should not become wet.

398

Practical hints

What to do if … Where will I find ...? Unlocking/locking in an emergency Resetting activated head restraints Replacing SmartKey batteries Replacing bulbs Replacing wiper blades Flat tire Bleeding the fuel system (diesel engine only) Battery Jump starting Towing the vehicle Fuses

399

Practical hints What to do if …

Lamps in instrument cluster

Problem - The yellow ABS indicator lamp comes on while the engine is running.

400

General information: If any of the following lamps in the instru- ment cluster fails to come on during the

bulb self-check when switching on the ignition, have the respective bulb checked and replaced if necessary.

Possible cause/consequence ABS has detected a malfunction and has switched off. The BAS, ESP®, EBP, and 4-ETS are also switched off (see messages in multi- function display). The brake system is still functioning normally but without the ABS available. If the ABS control unit is malfunctioning, other systems such as the navigation system* or the automatic transmission may also be malfunctioning.

The charging voltage has fallen below 10 volts. The ABS has switched off. The battery might not be charged sufficiently.

Suggested solution 왘 Continue driving with added caution. Wheels may lock during hard braking, reducing steering capability.

왘 Read and observe messages in the multifunction display (컄 page 413).

왘 Have the system checked at an authorized Mercedes-Benz Light Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident. When the voltage is above this value again, the ABS is operational again and the ABS indicator lamp should go out. If the ABS indicator lamp does not go out: 왘 Have the generator (alternator) and

the battery checked.

Problem

- The yellow ABS indicator lamp comes on while

the engine is running.

Possible cause/conse- quence The self-diagnosis has not yet been completed yet.

; (USA only) 3 (Canada only)

The red brake warning lamp comes on while driving and an acoustic warning sounds.

You are driving with the parking brake set.

There is insufficient brake fluid in the reservoir.

Warning!

Driving with the brake warning lamp illumi- nated can result in an accident. Have your brake system checked immediately if the brake warning lamp stays on.

Do not add brake fluid before checking the brake system. Overfilling the brake fluid res- ervoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be seriously burned.

Practical hints What to do if …

Suggested solution

The display will clear after driving a short distance at a vehicle speed of above 12 mph (20 km/h). 왘 Release the parking brake

(컄 page 57).

왘 Risk of accident! Carefully stop the

vehicle in a safe location or as soon as it is safe to do so.

왘 Apply the parking brake (컄 page 65). 왘 Contact an authorized

Mercedes-Benz Light Truck Center. Do not add brake fluid! This will not solve the problem.

! If you find that the brake fluid in the brake fluid reservoir has fallen to the minimum mark or below, have the brake system checked for brake pad thickness and leaks.

401

Possible cause/conse- quence The Electronic Brake Propor- tioning (EBP) has switched off due to a malfunction. The ABS, the BAS, and the ESP® are also switched off.

Suggested solution

왘 Have the system checked at an autho-

rized Mercedes-Benz Light Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident.

The red brake warning lamp comes on while driving. In addition, the yellow ABS mal- function indicator lamp, and the yellow ESP® warning lamp come on and an acoustic warn- ing sounds.

Practical hints What to do if …

Problem

; (USA only) 3 (Canada only)

402

Practical hints What to do if …

Possible cause/consequence Suggested solution There is a malfunction in: 앫 The fuel management system 앫 The ignition system 앫 The emission control system 앫 Systems which affect

왘 Have the vehicle checked as soon as

possible by an authorized Mercedes-Benz Light Truck Center. An on-board diagnostic connector is used by the service station to link the vehicle to the shop diagnostics system. It allows the accurate identi- fication of system malfunctions through the readout of diagnostic trouble codes. It is located in the front left area of the footwell next to the parking brake pedal.

Problem ? (USA only) ± (Canada only)

The yellow engine malfunc- tion indicator lamp comes on while driving.

emissions

Such malfunctions may result in excessive emissions values and may switch the engine to its limp-home (emergency opera- tion) mode.

i Some states may by law require you to visit a workshop as soon as the engine malfunction indicator lamp comes on. Check local require- ments.

403

Practical hints What to do if …

Problem

? (USA only) ± (Canada only)

The yellow engine malfunction indicator lamp comes on while driving.

Possible cause/conse- quence A loss of pressure has been detected in the fuel system. The fuel cap may not be closed properly or the fuel system may be leaky.

Vehicles with diesel engine: Your fuel tank is empty.

Suggested solution

왘 Check the fuel cap (컄 page 337). If it is not closed properly: 왘 Close the fuel cap. If it is closed properly: 왘 Have the fuel system checked by an

authorized Mercedes-Benz Light Truck Center.

왘 After refueling start, turn off and

restart the engine three or four times in succession.

The limp-home mode is canceled. You do not need to have your vehicle checked.

404

Problem v The yellow ESP® warning lamp comes on while the engine is running.

Possible cause/consequence The ESP® has been switched off with the ESP® switch or has switched off due to a malfunction. Risk of accident! Adapt your speed and driving to the prevail- ing road, weather, and traffic conditions.

v The yellow ESP® warning lamp

flashes while driving.

The ESP® or the 4-ETS has come into operation because of detected traction loss of at least one tire.

Practical hints What to do if …

Suggested solution 왘 Switch the ESP® back on (컄 page 103).

Exceptions: (컄 page 102).

If the ESP® cannot be switched back on: 왘 Continue driving with added caution. 왘 Observe additional messages in the

multifunction display that may appear. 왘 Have the system checked at an autho-

rized Mercedes-Benz Light Truck Center as soon as possible.

왘 When driving off, apply as little throttle

as possible.

왘 While driving, ease up on the accelera-

tor.

왘 Adapt your speed and driving to the pre-

vailing road and weather conditions.

왘 Do not deactivate the ESP®.

Exceptions: (컄 page 102).

Failure to follow these instructions increases the risk of an accident.

405

Practical hints What to do if …

Problem < The red seat belt telltale comes on for a maximum of 6 seconds after starting the engine.

Possible cause/consequence The seat belt telltale reminds you and your passengers to fasten your seat belts before driving off.

Suggested solution 왘 Fasten your seat belts.

Regardless of whether the seat belts are fastened or not, the seat belt tell- tale always comes on and remains lit for 6 seconds after starting the engine.

< You hear a warning chime for a

maximum of 6 seconds after starting the engine.

< The red seat belt telltale comes on while the vehicle is standing still and the engine is running or during driving.

You have forgotten to fasten your seat belt. 왘 Fasten your seat belt.

You and/or your front passenger have forgotten to fasten your seat belts.

There are items placed on the front passen- ger seat and therefore the system senses the front passenger seat as being occupied.

The warning chime stops sounding.

왘 Fasten your seat belts.

The seat belt telltale goes out.

왘 Remove the items from the front pas-

senger seat and put them in a safe place. The seat belt telltale goes out.

406

Practical hints What to do if …

Problem < During driving the red seat belt telltale flashes and you addition- ally hear an intermittent warning chime with increasing intensity.

Possible cause/consequence The vehicle’s speed once exceeded 15 mph (25 km/h) and you and/or your front pas- senger have forgotten to fasten your seat belts. There are items placed on the front passen- ger seat and therefore the system senses the front passenger seat as being occupied.

Suggested solution 왘 Fasten your seat belts.

The seat belt telltale goes out and the warning chime stops sounding.

왘 Remove the items from the front pas-

senger seat and put them in a safe place. The seat belt telltale goes out and the warning chime stops sounding.

i After 60 seconds with an unfastened seat belt on one of the front seats, the warning chime stops sounding and the seat belt telltale illuminates continuously. The seat belt telltale will only go out if both, the driver and front passenger’s seat belt are fastened, or the vehi- cle is standing still and a front door is opened.

407

Practical hints What to do if …

Problem H USA only:

Combination low tire pressure/TPMS malfunction telltale for the TPMS illuminates continuously. Canada only: Low tire pressure telltale for the Advanced TPMS* illuminates continuously.

H USA only:

Combination low tire pressure/TPMS malfunction telltale for the TPMS flashes 60 seconds and then stays illuminated.

408

Possible cause/consequence The TPMS (USA only) or Advanced TPMS* (Canada only) detects a loss of pressure in at least one tire.

There is a malfunction in the TPMS.

Suggested solution 왘 Carefully bring the vehicle to a halt, avoiding abrupt steering and braking maneuvers. Observe the traffic situation around you.

왘 Read and observe messages in the

multifunction display.

If the tire inflation pressure in the respec- tive tire(s) has (have) been corrected, the combination low tire pressure/TPMS mal- function telltale goes out after few minutes driving. 왘 Read and observe messages in the

multifunction display.

왘 Have the TPMS checked by an

authorized Mercedes-Benz Light Truck Center.

After the malfunction has been remedied the combination low tire pressure/TPMS malfunction telltale goes out after few minutes driving.

Warning!

Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recom- mended by the vehicle manufacturer on the Tire and Loading Information placard on the driver’s door B-Pillar or, if available, the tire inflation pressure label on the fuel filler flap. If your vehicle has tires of a different size than the size indicated on the Tire and Loading Information placard or, if available, the tire inflation pressure label, you should determine the proper tire inflation pressure for those tires.

As an added safety feature, your vehicle has been equipped with a tire pressure monitor- ing system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is significantly underinflated. Accord- ingly, when the low tire pressure telltale illu- minates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significant- ly underinflated tire causes the tire too over- heat and can lead to tire failure.

Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehi- cle’s handling and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driv- er’s responsibility to maintain correct tire pressure, even if underinflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale.

Practical hints What to do if …

USA only: Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the system is not operating properly. The TPMS malfunction indicator is com- bined with the low tire pressure telltale. When the system detects a malfunction, the telltale will flash for approximately 1 minute and then remain continuously illuminated. This sequence will continue upon subse- quent vehicle start-ups as long as the malfunction exists. When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended.

TPMS malfunctions may occur for a variety of reasons, including the installation of in- compatible replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly. Always check the TPMS malfunction telltale after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly.

409

Practical hints What to do if …

Problem

The yellow fuel tank reserve warn- ing lamp in the fuel gauge comes on while driving.

1 The red SRS indicator lamp comes

on while driving.

Possible cause/consequence The fuel level has gone below the reserve mark. 왘 Refuel at the next gas station

Suggested solution

(컄 page 337).

There is a malfunction in the restraint systems. The air bags or Emergency Tensioning Device (ETDs) could deploy unexpectedly or fail to deploy unexpectedly in an accident.

왘 Drive with added caution to the

nearest authorized Mercedes-Benz Light Truck Center.

Warning!

In the event a malfunction of the SRS is indi- cated as outlined above, the SRS may not be operational. For your safety, we strongly recommend that you visit an authorized Mercedes-Benz Light Truck Center immedi- ately to have the system checked, otherwise

the SRS may not be activated when needed in an accident, which could result in serious or fatal injury, or it might deploy unexpect- edly and unnecessarily which could result in an accident and/or injury to you or to others.

410

Possible cause/consequence The system is malfunctioning.

Practical hints What to do if …

Suggested solution 왘 Have the system checked as soon as

possible by an authorized Mercedes-Benz Light Truck Center.

왘 Also read and observe any messages in the multifunction display and follow corrective steps (컄 page 421).

Lamp in center console

Problem 59 The front passenger

front air bag off indica- tor lamp illuminates and remains illuminat- ed with the weight of a typical adult or some- one larger than a small individual on the front passenger seat.

Warning!

If the 59 indicator lamp illuminates and remains illuminated with the weight of a typical adult or someone larger than a small individual on the front passen- ger seat, do not have any passenger use the front passenger seat until the system has been repaired.

411

Practical hints What to do if …

Problem

59 The front passenger

front air bag off indica- tor lamp does not illu- minate and/or does not remain illuminated with the weight of a typical 12-month-old child in a standard child restraint or less on the front passenger seat.

Possible cause/consequence The system is malfunction- ing.

Suggested solution

왘 Make sure there is nothing between seat cushion and

child seat and check installation of the child seat.

왘 Make sure no objects applying supplemental weight

onto the seat are present.

왘 Make sure no objects which apply forces to the seat are present (e.g. objects such as books, briefcases etc. lodged behind or around the seat, head restraints pushing against roof etc.). The system may recognize such forces as supplemental weight.

왘 If the front passenger front air bag off indicator lamp remains out, have the system checked as soon as pos- sible by an authorized Mercedes-Benz Light Truck Center. Do not transport a child on the front passen- ger seat until the system has been repaired.

왘 Also note any messages in the multifunction display

and follow corrective steps (컄 page 421).

Warning!

If the 59 indicator lamp does not illuminate or remains out with the

412

weight of a typical 12-month-old child in a standard child restraint or less on the front passenger seat, do not transport a child on

the front passenger seat until the system has been repaired.

Vehicle status messages in the multifunction display

Warning and malfunction messages appear in the multifunction display located in the instrument cluster. Certain warning and malfunction messag- es are accompanied by an audible signal. Address these messages accordingly and follow the additional instructions given in this Operator’s Manual. Selecting the vehicle status message memory menu in the control system (컄 page 162) displays both cleared and uncleared messages. High-priority messages appear in the multifunction display in red color.

Certain messages of high priority cannot be cleared from the multifunction display using the reset button (컄 page 145) or button j, k, ÿ, or è on the multifunction steering wheel. Other messages of high priority and mes- sages of less immediate priority can be cleared from the multifunction display using the reset button (컄 page 145) or button j, k, ÿ, or è on the multifunction steering wheel. They are then stored in the vehicle status message memory (컄 page 162). Remember that clearing a message will only make the mes- sage disappear. Clearing a message will not correct the condition that caused the message to appear.

Practical hints What to do if …

Warning!

All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes-Benz Light Truck Center.

Failure to repair condition noted may cause damage not covered by the Mercedes-Benz Limited Warranty, or result in property dam- age or personal injury.

413

i Switching on the ignition causes all instrument cluster lamps (except high beam headlamp indicator lamp, and turn signal indicator lamps unless activated) as well as the multifunction display to come on. Make sure the lamps and multifunction display are in working order before starting your journey.

On the pages that follow, you will find a compilation of the most important warning and malfunction messages that may appear in the multifunction display. For your convenience the messages are divided into two sections: 앫 Text messages (컄 page 415) 앫 Symbol messages (컄 page 427)

Practical hints What to do if …

Warning!

No messages will be displayed if either the instrument cluster or the multifunction display is inoperative.

As a result, you will not be able to see infor- mation about your driving conditions, such as speed or outside temperature, warn- ing/indicator lamps, malfunction/warning messages or the failure of any systems. Driving characteristics may be impaired.

If you must continue to drive, please do so with added caution. Visit an authorized Mercedes-Benz Light Truck Center as soon as possible.

414

Text messages

Display message ABS

ABS, ESP Inoperative See Operator’s Manual

ABS, ESP Unavailable See Operator’s Manual

Practical hints What to do if …

Possible cause/consequence The ABS and the ESP® have been switched off due to a malfunction. The BAS is also switched off. The brake system is still functioning normally but without the ABS avail- able.

The ABS and the ESP® have been switched off because of insufficient power supply. The charging voltage has fallen below 10 volts. The BAS is also switched off. The brake system is still functioning normally but without the ABS available.

Possible solution 왘 Continue driving with added caution. Wheels may lock during hard braking, reducing steering capability.

왘 Have the system checked at an authorized Mercedes-Benz Light Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident. When the voltage is above this value again, the ABS is operational again and the message in the multifunction display should disappear. If the message in the multifunction display does not disappear: 왘 Have the system checked at an authorized Mercedes-Benz Light Truck Center as soon as possible.

415

Unavailable See Operator’s Manual

Possible cause/consequence The self-diagnosis has not yet been completed yet.

Possible solution The display will clear after driving a short distance at a vehicle speed of above 12 mph (20 km/h).

Inoperative

The cruise control is malfunctioning. 왘 Have cruise control checked by an

You have attempted to set a speed while driving below 20 mph (30 km/h). The ESP® is switched off. The automatic transmission is set to position P, R, or N. The vehicle is secured with the parking brake.

authorized Mercedes-Benz Light Truck Center.

왘 Accelerate to a speed exceeding

20 mph (30 km/h) and set the speed (컄 page 244).

왘 Switch on the ESP® (컄 page 100). 왘 Set the automatic transmission to

position D (컄 page 185).

왘 Release the parking brake

(컄 page 57).

Practical hints What to do if …

Display message ABS

Cruise Control And SPEEDTRONIC

Cruise Control

––– MPH

416

Display message

Depress brake to shift out of P.

Door Open Vehicle Not In Park

Possible cause/consequence You have tried to shift the automatic transmission into position D, R or N using the gear selector lever without depressing the brake pedal. You have opened the driver’s door and the automatic transmission is still in position D, R or N.

Drive to workshop without shifting gears.

The automatic transmission cannot be shifted out of the set position be- cause of a malfunction.

Practical hints What to do if …

Possible solution 왘 Depress the brake pedal.

왘 Before you leave the vehicle, make sure that the automatic transmission is set to position P and that the parking brake is engaged.

If the automatic transmission is set to position D: 왘 Without changing the automatic transmis- sion from position D, drive to an authorized Mercedes-Benz Light Truck Center. If the automatic transmission is set to position N, R or P: 왘 Do not drive. 왘 Contact an authorized Mercedes-Benz Light

Truck Center.

417

Practical hints What to do if …

Display message ESP

Inoperative See Operator’s Manual

418

Possible cause/consequence In addition, the yellow ESP® warning lamp v comes on. The ESP® has detected a malfunc- tion and switched off. The ABS may still be operational.

In addition, the yellow ESP® warning lamp v comes on. The ESP® or the ESP® display is malfunctioning.

In addition, the yellow ESP® warning lamp v comes on. The ESP® is deactivated because of a malfunction or interrupted power supply.

Possible solution 왘 Continue driving with added caution. 왘 Have the system checked at an authorized Mercedes-Benz Light Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident. 왘 Continue driving with added caution. 왘 Have the system checked at an authorized Mercedes-Benz Light Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident. 왘 Continue driving with added caution. 왘 Contact an authorized Mercedes-Benz Light

Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident.

Display message ESP

Unavailable See Operator’s Manual

Practical hints What to do if …

Possible cause/consequence The ESP® was deactivated because of insufficient power supply. The charging voltage has fallen below 10 volts. The brake system is still functioning normally but without the ESP® available.

If the yellow ESP® warning lamp v flashes while driving and this message appears, the 4-ETS has switched off to prevent overheating of the drive wheel brakes.

The self-diagnosis has not been completed yet.

Possible solution When the voltage is above this value again, the ESP® is operational again and the message in the multifunction display should disappear. If the message in the multifunction display does not disappear: 왘 Have the generator (alternator) and the

battery checked.

왘 Have the system checked at an authorized Mercedes-Benz Light Truck Center as soon as possible.

As soon as the brakes have cooled off, the 4-ETS switches on again. The message in the multifunction display disap- pears and the ESP® warning lamp v goes out. The display will clear after driving a short distance at a vehicle speed of above 12 mph (20 km/h).

419

Practical hints What to do if …

Display message

Shift to P or N to start engine.

Only shift to P when vehicle is at a standstill.

SRS

Restraint Sys. Malfunction Service Required

Possible cause/consequence You have attempted to start the engine with the KEYLESS-GO* start/stop button while the auto- matic transmission was set to position R or D.

You have tried to shift the automatic transmission into position P using the gear selector lever although the vehicle is still in motion. The system is malfunctioning.

Possible solution 왘 Set the automatic transmission to

position P or N. Make sure the brake pedal is depressed when attempting to start the engine with the KEYLESS-GO* start/stop button.

왘 Stop the vehicle. 왘 Apply the parking brake (컄 page 65).

왘 Drive with added caution to the nearest authorized Mercedes-Benz Light Truck Center.

the SRS may not be activated when needed in an accident, which could result in serious or fatal injury, or it might deploy unexpect- edly and unnecessarily which could also re- sult in injury.

Warning!

In the event a malfunction of the SRS is indi- cated as outlined above, the SRS may not be operational. For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Light Truck Center immedi- ately to have the system checked; otherwise

420

Display message

Front Passenger Airbag Enabled See Operator’s Manual

Possible cause/consequence Front passenger front air bag is activated while driving even though a child, small individual, or object below the system’s weight threshold is on the front passenger seat, or the front passenger seat is empty. Objects on the seat or forces acting on the seat may make the system sense sup- plemental weight.

Practical hints What to do if …

Possible solution

Stop the vehicle in a safe location as soon as possible and check the front passenger seat for the following: 왘 Apply the parking brake (컄 page 65). 왘 Switch off the ignition (컄 page 40). 왘 Remove child and child restraint from front passenger seat and properly secure the child in rear seat employing the child restraint if necessary. 왘 Remove any other items from on and around the front passenger seat and make sure the storage bag on the back of the front passenger seat is empty.

왘 Make sure that no objects which apply forces to the seat are present (e.g. objects such as books, briefcases etc. lodged behind or around the seat, head restraints pushing against roof etc.). The system may recog- nize such forces as supplemental weight and sense that an occupant on the front passenger seat is of a greater weight than actually present. 왘 Keep the seat unoccupied, close the front passenger door and switch

on the ignition (컄 page 40). (Continued on next page)

421

Practical hints What to do if …

Display message

Possible cause/conse- quence

Possible solution

Monitor the 59 indicator lamp on the center console (컄 page 83) and the multifunction display in the instrument cluster (컄 page 26) for the following: With the seat unoccupied and the ignition turned on, 앫 the 59 indicator lamp on the center console should illuminate and remain illuminated, indicating that the OCS (컄 page 79) has deactivated the air bag.

앫 the message Front Passenger Airbag Enabled See Operator’s Manual or the message Front Passenger Airbag Disabled See Operator’s Manual should not appear in the multifunction display at any time the seat is unoccupied. Wait at least 60 seconds for the system to complete the necessary check cycles and to make sure neither message appears in the multifunction display.

If above conditions are met, you can occupy the front passenger seat again. Depending on the front passenger classification sensed by the OCS (컄 page 79), the 59 indicator lamp will remain illuminated or go out. If above conditions are not met, the system is not working properly. Have the system checked as soon as possible by an authorized Mercedes-Benz Light Truck Center.

Warning!

If the 59 indicator lamp

remains out even after performing the above corrective steps, do not have any children 12 years old and under and other small

individuals use the front passenger seat until the system has been repaired.

422

Display message

Front Passenger Airbag Disabled See Operator’s Manual

Possible cause/conse- quence Front passenger front air bag is deactivated while driving even though an adult or someone larger than a small individual is occupying the front passenger seat. Forces acting on the seat may make the system sense a decrease in weight.

Practical hints What to do if …

Possible solution

Stop the vehicle in a safe location as soon as possible and check the front passenger seat for the following: 왘 Apply the parking brake (컄 page 65). 왘 Switch off the ignition (컄 page 40). 왘 Have the front passenger vacate the seat and exit the vehicle. 왘 Adjust the seat in a height position (컄 page 44). 왘 Make sure that no objects which apply forces to the seat are present (e.g. objects such as books, briefcases etc. lodged underneath, behind or around the seat). Such forces may cause the system to sense that an occupant of a lesser weight than actually present is on the front passenger seat.

왘 Keep the seat unoccupied, close the front passenger door and switch

on the ignition (컄 page 40).

(Continued on next page)

423

Practical hints What to do if …

Display message

Possible cause/conse- quence

Possible solution

Monitor the 59 indicator lamp on the center console (컄 page 83) and the multifunction display in the instrument cluster (컄 page 26) for the following: With the seat unoccupied and the ignition turned on, 앫 the 59 indicator lamp on the center console should illuminate and remain illuminated, indicating that the OCS (컄 page 79) has deactivated the air bag.

앫 the message Front Passenger Airbag Enabled See Operator’s Manual or the message Front Passenger Airbag Disabled See Operator’s Manual should not appear in the multifunction display at any time the seat is unoccupied. Wait at least 60 seconds for the system to complete the necessary check cycles and to make sure neither message appears in the multifunction display.

If above conditions are met, you can occupy the front passenger seat again. Depending on the front passenger classification sensed by the OCS (컄 page 79), the 59 indicator lamp will remain illuminated or go out. If above conditions are not met, the system is not working properly. Have the system checked as soon as possible by an authorized Mercedes-Benz Light Truck Center.

Warning!

If the 59 indicator lamp

remains illuminated with an adult occupant on the front passenger seat even after per- forming the above corrective steps, do not

have any passenger use the front passenger seat until the system has been repaired.

424

Display message Check tires, then restart Run Flat Indicator.

Run Flat Indicator Inoperative Tire Pressure Check Tires

Possible cause/consequence There was a warning message about a loss in the tire inflation pressure and the Run Flat Indicator has not been restarted yet. The Run Flat Indicator is malfunction- ing. The Run Flat Indicator indicates that the pressure is too low in one or more tires.

Tire pressure displayed after driving for a few minutes.

Vehicles with Advanced TPMS*: The tire inflation pressure is being checked.

Practical hints What to do if …

Possible solution 왘 Make sure that the correct tire inflation pressure is set

for each tire.

왘 Then restart the Run Flat Indicator (컄 page 361).

왘 Have the Run Flat Indicator checked by an authorized

Mercedes-Benz Light Truck Center.

왘 Carefully bring the vehicle to a halt, avoiding abrupt steering and braking maneuvers. Observe the traffic situation around you.

왘 Check and adjust tire inflation pressure as required

(컄 page 359).

왘 If necessary, replace the wheel (컄 page 478). 왘 Reactivate the Run Flat Indicator after adjusting the tire

inflation pressure values (컄 page 361).

왘 Drive the vehicle for a few minutes.

425

Practical hints What to do if …

Display message Tire Pressure Monitor Inoperative Tire Pressure Monitor Inoperative No Wheel Sensors

Tire Pressure Monitor Wheel Sensor Missing

Tire Pressure Monitor Currently Unavailable

426

Possible cause/consequence The TPMS or Advanced TPMS* is malfunctioning. There are wheels without appropriate wheel sensors mounted (e.g. winter tires).

Possible solution 왘 Have the TPMS or Advanced TPMS* checked by an

authorized Mercedes-Benz Light Truck Center.

왘 Have the TPMS or Advanced TPMS* checked by an

authorized Mercedes-Benz Light Truck Center.

Vehicles with Advanced TPMS*: One or more sensors are defect (e.g. battery is empty). The respective tire is indicated by - - - instead of the tire inflation pressure in the multifunction display. Vehicles with Advanced TPMS*: One or more wheels without appropriate wheel sensors mounted (e.g. spare tire). The respective tire is indicated by - - - instead of the tire inflation pressure in the multifunction display. The TPMS or Advanced TPMS* is unable to monitor the tire pressure due to a nearby radio interference source.

왘 Have the wheel sensors installed by an authorized

Mercedes-Benz Light Truck Center.

왘 Have the Advanced TPMS* checked by an autho-

rized Mercedes-Benz Light Truck Center.

왘 Have the wheel sensors installed by an authorized

Mercedes-Benz Light Truck Center.

왘 Have the Advanced TPMS* checked by an autho-

rized Mercedes-Benz Light Truck Center.

왘 Have the wheel sensors installed by an authorized

Mercedes-Benz Light Truck Center.

왘 As soon as the causes of the malfunction have been removed, the TPMS or Advanced TPMS* automati- cally becomes active again after a few minutes driving.

Symbol messages

Display symbol ò

Display message Replace air filter. The air filter is clogged.

Possible cause/consequence

The battery is no longer charging. Possible causes: 앫 alternator malfunctioning 앫 broken poly-V-belt Do not forget that the brake system requires electrical energy and may be operating with restricted capability. Considerably greater brake pedal force is required and the stopping dis- tance is increased.

Practical hints What to do if …

Possible solution 왘 Have the air filter checked by an authorized

Mercedes-Benz Light Truck Center.

왘 Stop the vehicle in a safe location or as soon as

it is safe to do so.

왘 Apply the parking brake (컄 page 65). 왘 Check the poly-V-belt. If it is broken: 왘 Do not continue to drive. Otherwise the engine will overheat due to an inoperative water pump which may result in damage to the engine. Contact an authorized Mercedes-Benz Light Truck Center.

If it is intact: 왘 Drive immediately to the nearest authorized

Mercedes-Benz Light Truck Center. Adjust driving to be consistent with reduced braking responsiveness.

427

Possible cause/consequence Possible solution The battery is defective.

왘 Stop the vehicle in a safe location or as

soon as it is safe to do so.

왘 Apply the parking brake (컄 page 65). 왘 Do not continue to drive. 왘 Contact an authorized Mercedes-Benz

Light Truck Center.

왘 Have the Downhill Speed Regulation

checked by an authorized Mercedes-Benz Light Truck Center.

왘 Have the brake pads replaced as soon as

possible.

Practical hints What to do if …

Display symbol

Display message Battery/Alternator Stop Vehicle

Inoperative

Brake Wear

! Brake pad thickness must be visually in- spected by a qualified technician at the intervals specified in the Maintenance Booklet.

Downhill Speed Regulation is malfunctioning.

The brake pads have reached their wear limit.

428

Practical hints What to do if …

Display symbol ; (USA only) ! (Canada only) ; (USA only) 3 (Canada only)

Display message Release Parking Brake

Possible cause/consequence Possible solution You are driving with the parking brake set.

왘 Release the parking brake (컄 page 57).

EBV, ABS, ESP Inoperative See Operator’s Manual

The EBP, the ABS, and the ESP® have switched off due to a mal- function. The BAS is also switched off. The brake system is still func- tional but without the EBP, the ABS, and the ESP® available.

왘 Continue driving with added caution. Wheels may lock during hard braking, reducing steering capability.

왘 Have the system checked at an

authorized Mercedes-Benz Light Truck Center as soon as possible.

Failure to follow these instructions increases the risk of an accident.

429

Possible cause/consequence Possible solution There is insufficient brake fluid in the reservoir.

왘 Risk of accident! Stop the vehicle in a

safe location or as soon at is safe to do so.

왘 Apply the parking brake (컄 page 65). 왘 Contact an authorized Mercedes-Benz Light Truck Center. Do not add brake fluid! This will not solve the problem.

! If you find that the brake fluid in the brake fluid reservoir has fallen to the minimum mark or below, have the brake system checked for brake pad thickness and leaks.

Practical hints What to do if …

Display symbol ; (USA only) 3 (Canada only)

Display message Check Brake Fluid Level

Warning!

Driving with the message Check Brake Fluid Level displayed can result in an accident. Have your brake system checked immediately. Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You could be seriously burned.

430

Display symbol Ï

Display message Coolant Level Stop car, switch engine off.

Practical hints What to do if …

Possible cause/consequence Possible solution The coolant is too hot. Among other possible causes (the cooling fan could be malfunctioning), the poly-V-belt could be broken.

왘 Stop the vehicle in safe location or as

soon as it safe to do so.

왘 Apply the parking brake (컄 page 65). 왘 Turn off the engine. 왘 Check the poly-V-belt. If it is broken: 왘 Do not continue to drive. Otherwise, the engine will overheat due to an inoperative water pump which may result in damage to the engine. Contact an authorized Mercedes-Benz Light Truck Center.

If it is intact: 왘 Do not continue to drive the vehicle with this message displayed. Doing so could result in serious engine damage that is not covered by the Mercedes-Benz Limit- ed Warranty. (Continued on next page)

431

Practical hints What to do if …

Display symbol

Display message

Possible cause/consequence Possible solution

왘 Observe the coolant temperature in the

multifunction display (컄 page 154). If the temperature raises again:

왘 Contact an authorized Mercedes-Benz

Light Truck Center immediately.

During severe operation conditions and stop-and-go city traffic, the coolant tem- perature may rise close to 248°F (120°C).

! The engine should not be operated with the coolant temperature above 248°F (120°C). Doing so may cause serious damage which is not covered by the Mercedes-Benz Limited Warranty.

Warning!

앫 Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned.

앫 Steam from an overheated engine can cause serious burns which can occur just by opening the hood. Stay away from the engine if you see or hear steam coming from it.

Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.

432

Practical hints What to do if …

Display symbol

Display message Top Up Coolant See Operator’s Manual

Possible cause/consequence Possible solution The coolant level is too low.

왘 Add coolant (컄 page 345). 왘 If you have to add coolant frequently,

have the cooling system checked by an authorized Mercedes-Benz Light Truck Center.

Warning!

Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. You could be seriously burned.

! Do not ignore the low engine coolant level warning. Extended driving with the message and symbol displayed may cause serious engine damage not covered by the Mercedes-Benz Limited Warranty. Do not drive without sufficient amount of coolant in the cooling system. The engine will overheat causing major engine damage.

433

Practical hints What to do if …

Display symbol

Display message Check engine oil level at next refueling.

Possible cause/consequence Possible solution The engine oil level is too low.

왘 Check the engine oil level (컄 page 343)

and add engine oil as required (컄 page 344).

When the message Check engine oil level at next refueling. appears while the engine is running and at operating tem- perature, the engine oil level has dropped to approximately the minimum level. When this occurs, the warning will first come on intermittently and then stay on if the oil level drops further. Visually check for oil leaks. If no obvious oil leaks are noted, drive to the nearest service station where the engine oil should be topped to the required level with an approved engine oil.

For information on approved engine oils, refer to the Factory Approved Service Products pamphlet (USA only) or contact an authorized Mercedes-Benz Light Truck Center.

! The engine oil level warning should not be ignored. Extended driving with the symbol dis- played could result in serious engine damage that is not covered by the Mercedes-Benz Limited Warranty.

434

Practical hints What to do if …

Possible cause/consequence Possible solution You are driving with one or more doors open.

soon as it is safe to do so.

왘 Stop the vehicle in a safe location or as

Display symbol

Display message

Clean Fuel Filter Gas Cap Open

A loss of pressure has been detected in the fuel system. The fuel cap may not be closed properly or the fuel system may be leaky.

You are driving with the hood or the tailgate open.

You are trying to lock the vehicle with the KEYLESS-GO* function with a door or the tailgate open.

왘 Close the door(s). 왘 Contact an authorized Mercedes-Benz

Light Truck Center.

왘 Check the fuel cap (컄 page 337). If it is not closed properly: 왘 Close the fuel cap. If it is closed properly: 왘 Have the fuel system checked by an

authorized Mercedes-Benz Light Truck Center.

왘 Carefully bring the vehicle to a halt as

soon as it is safe to do so in a safe location.

왘 Close the hood (컄 page 341) or the

tailgate (컄 page 119).

왘 Close all doors and/or the tailgate

(컄 page 119).

435

Practical hints What to do if …

Display symbol

Display message Key Not Detected

Key Not Detected

436

Possible cause/consequence Possible solution The SmartKey with KEYLESS-GO* is not detected while the engine is running because 앫 the SmartKey with

왘 Stop the vehicle in a safe location or as

soon as it is safe to do so.

왘 Apply the parking brake (컄 page 65). 왘 Search for the SmartKey with

KEYLESS-GO* is not in the vehicle

앫 there is strong

radio-frequency interference

The SmartKey with KEYLESS-GO* is momentarily not detected.

The SmartKey with KEYLESS-GO* is not detected while the ignition is switched on (컄 page 40) and a door is opened or closed and the SmartKey with KEYLESS-GO* is not in the vehicle.

KEYLESS-GO*. Otherwise the vehicle cannot be centrally locked nor can the engine be started again after the engine is stopped.

왘 Change the position of the SmartKey with

KEYLESS-GO* in the vehicle.

왘 Operate the vehicle with the SmartKey in

the starter switch if necessary. 왘 Search for the SmartKey with

KEYLESS-GO*. Otherwise the vehicle cannot be locked nor can the engine be started.

왘 Change the position of the SmartKey with

KEYLESS-GO* in the vehicle.

Practical hints What to do if …

Display symbol

Display message Key Detected In Vehicle

Remove Key

You need a new key.

Key Does Not Belong to Vehicle

Change Key Batteries

Don’t Forget Your Key

왘 Take the SmartKey with KEYLESS-GO*

out of the vehicle.

왘 Remove the SmartKey from the starter

왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

왘 Find the SmartKey or SmartKey with

KEYLESS-GO* that belongs to the vehicle to operate the vehicle.

왘 Replace the batteries (컄 page 461).

switch.

Possible cause/consequence Possible solution A SmartKey with KEYLESS-GO* left in the vehicle was detected while trying to lock the vehicle from the outside. You have forgotten to remove the SmartKey. There is no additional code avail- able for SmartKey or SmartKey with KEYLESS-GO*. The SmartKey or SmartKey with KEYLESS-GO* in the starter switch does not belong to the vehicle. The batteries in the SmartKey with KEYLESS-GO* are dis- charged. This message appears for a maximum of 60 seconds if the driver’s door is opened with the engine shut off and no SmartKey in the starter switch. This message is only a reminder.

왘 Insert the SmartKey in the starter

switch (컄 page 40).

or 왘 Take the SmartKey with KEYLESS-GO*

with you when leaving the vehicle.

437

Practical hints What to do if …

Display symbol

Display message 3rd Brake Lamp

Active Headlamps Inoperative AUTO Light Inoperative

Brake Lamp Left

Brake Lamp Right

438

Possible cause/consequence Possible solution The high mounted brake lamp is malfunctioning. This message will only appear if a critical num- ber of LEDs have stopped work- ing. The active Bi-Xenon* headlamp system is malfunctioning. The light sensor is malfunction- ing. The headlamps switch on automatically.

왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible. 왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

To switch off the headlamps (U. S. vehicles only): 왘 In the control system, set lamp operation

to manual mode (컄 page 136).

The left brake lamp is malfunc- tioning. A substitute bulb is being used. The right brake lamp is malfunc- tioning. A substitute bulb is being used.

왘 Switch off the headlamps using the exterior lamp switch (컄 page 135).

왘 Replace the bulb as soon as possible

(컄 page 471).

왘 Replace the bulb as soon as possible

(컄 page 471).

Display symbol

Display message Cornering Lamp Left Cornering Lamp Right Front Foglamp Left Front Foglamp Right High Beam Left

Practical hints What to do if …

Possible cause/consequence The left corner-illuminating front fog lamp is malfunctioning. The right corner-illuminating front fog lamp is malfunctioning. The left front fog lamp is malfunctioning. 왘 Replace the bulb as soon as possible

Possible solution 왘 Replace the bulb as soon as possible

왘 Replace the bulb as soon as possible

(컄 page 469).

(컄 page 469).

(컄 page 469).

The right front fog lamp is malfunctioning. 왘 Replace the bulb as soon as possible

(컄 page 469).

The left high beam lamp is malfunctioning.

High Beam Right

The right high beam lamp is malfunctioning.

Halogen headlamp: 왘 Replace the bulb as soon as possible

(컄 page 467).

Bi-Xenon* headlamp: 왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

Halogen headlamp: 왘 Replace the bulb as soon as possible

(컄 page 467).

Bi-Xenon* headlamp: 왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

439

Practical hints What to do if …

Display symbol

Display message License Plate Lamp Left License Plate Lamp Right Low Beam Left

Possible cause/consequence Possible solution The left license plate lamp is malfunctioning. The right license plate lamp is malfunctioning. The left low beam lamp is malfunctioning.

(컄 page 473).

(컄 page 473).

왘 Replace the bulb as soon as possible

왘 Replace the bulb as soon as possible

Halogen headlamp: 왘 Replace the bulb as soon as possible

(컄 page 466).

Low Beam Right

The right low beam lamp is malfunctioning.

Bi-Xenon* headlamp: 왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

Halogen headlamp: 왘 Replace the bulb as soon as possible

(컄 page 466).

Bi-Xenon* headlamp: 왘 Contact an authorized Mercedes-Benz Light Truck Center as soon as possible.

440

Practical hints What to do if …

Display symbol

Display message Marker Lamp Front Left Marker Lamp Front Right Parking Lamp Front Left

Parking Lamp Front Right

Foglamp Rear Left Reverse Lamp Left Reverse Lamp Right

왘 Replace the bulb as soon as possible

왘 Replace the bulb as soon as possible

왘 Replace the bulb as soon as possible

왘 Replace the bulb as soon as possible