2006 Mercedes-benz M Class Owners Manual

Practical hints What to do if …

Where will I find ...?

Unlocking/locking in an emergency

Opening/closing in an emergency

Replacing SmartKey batteries

Replacing bulbs

Replacing wiper blades

Flat tire

Battery

Jump starting

Towing the vehicle

Fuses

381

Practical hints What to do if …

Lamps in instrument cluster

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

382

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 igni- tion, have the respective bulb checked and replaced if necessary.

Possible cause ABS has detected a malfunction and has switched off. The BAS, ESP®, and 4-ETS are also switched off (see messages in multifunc- tion 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 ten 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 395).

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 Switch off electrical consumers that

are currently not needed, e.g. seat heating*.

왘 If necessary, have the generator

(alternator) and the battery checked.

When the voltage is above this value again, the ABS is operational again.

Practical hints What to do if …

Problem ; (USA only) 3 (Canada only)

The red brake warning lamp comes on while driving and you hear a warning sound.

Possible cause You are driving with the parking brake set.

Suggested solution 왘 Release the parking brake.

The ESP® control unit may be malfunctioning. The driving safety systems may not be available.

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

왘 Read and observe messages in the

display.

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.

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 reservoir can result in spilling brake fluid on hot en- gine parts and the brake fluid catching fire. You can be seriously burned.

383

The red brake warning lamp comes on while driving. In ad- dition, the yellow ABS malfunc- tion indicator lamp, and the yellow ESP® warning lamp come on and a warning will sound. The red brake warning lamp comes on while driving.

Possible cause A malfunction in the EBP was detected.

There is insufficient brake fluid in the reservoir.

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 in- creases the risk of an accident.

왘 Risk of accident! Carefully stop the

vehicle and notify an authorized Mercedes-Benz Light Truck Center. Do not add brake fluid! This will not solve the problem.

Practical hints What to do if …

Problem ; (USA only) 3 (Canada only)

; (USA only) 3 (Canada only)

384

Problem ? (USA only) ± (Canada only)

The yellow engine malfunction indicator lamp comes on while driving.

Practical hints What to do if …

Suggested solution 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 identifi- cation 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.

Possible cause There is a malfunction in: 앫 The fuel management

system

앫 The ignition system 앫 The emission control

system

앫 Systems which affect

emissions

Such malfunctions may result in excessive emissions values and may switch the engine to its limp-home (emergency op- eration) mode (컄 page 192).

385

Practical hints What to do if …

Problem ? (USA only) ± (Canada only)

The yellow engine malfunction indicator lamp comes on while driving.

Possible cause 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.

Suggested solution 왘 Check the fuel cap (컄 page 323). 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.

Your fuel tank is empty.

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.

386

Problem v The yellow ESP® warning lamp

comes on while the engine is running.

v The yellow ESP® warning lamp

flashes while driving.

Possible cause The ESP® is deactivated. Risk of accident! Adapt your speed and driving to the prevail- ing road, weather, and traffic conditions.

The ESP® or traction control 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 98). If the ESP® cannot be switched back on, have the system checked at an autho- rized Mercedes-Benz Light Truck Center as soon as possible. 왘 When driving off, apply as little throt-

tle as possible.

왘 While driving, ease up on the acceler-

ator.

왘 Adapt your speed and driving to the

prevailing road and weather condi- tions.

왘 Do not deactivate the ESP®.

Exceptions: (컄 page 97).

Failure to follow these instructions in- creases the risk of an accident.

387

Practical hints What to do if …

Problem

The yellow fuel tank reserve warning lamp comes on while driving.

< The red seat belt telltale comes on and a warning chime sounds for approximately six seconds af- ter starting the engine with all doors closed.

Possible cause The fuel level has gone below the reserve mark.

Suggested solution 왘 Refuel at the next gas station

(컄 page 323).

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

왘 Fasten your seat belts.

The seat belt telltale goes out.

388

Practical hints What to do if …

Possible cause You and/or your front passenger have for- gotten 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. You and/or your front passenger have for- gotten 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.

왘 Remove the items from the front pas-

senger seat and put them in a safe place.

왘 Fasten your seat belts.

왘 Remove the items from the front pas-

senger seat and put them in a safe place.

The seat belt telltale will only go out if both the driver and front passenger’s seat belt are fastened, or the vehicle is standing still and a front door is opened.

Problem < The red seat belt telltale remains illuminated after driving off. The vehicle’s speed does not exceed 15 mph (25 km/h).

< The red seat belt telltale flashes and you additionally hear an in- termittent warning chime with in- creasing intensity for a maximum of 60 seconds from the time the vehicle’s speed exceeds 15 mph (25 km/h).

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 continu- ously.

389

Practical hints What to do if …

Problem 1 The red SRS indicator lamp comes

on while driving.

Possible cause There is a malfunction in the restraint systems. The air bags or emergency tensioning device (ETDs) could deploy unexpectedly or fail to de- ploy unexpectedly in an accident.

Suggested solution 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/or injury to you or to others.

390

Problem H Combination low tire pres-

sure/TPMS malfunction telltale for the TPMS* illuminates con- tinuously.

Possible cause The Advanced TPMS* detects a loss of pressure in at least one tire.

H Combination low tire pres-

sure/TPMS malfunction telltale for the Advanced TPMS* flashes 60 seconds and then stays illu- minated.

There is a malfunction in the Advanced TPMS*.

Practical hints What to do if …

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

왘 Take note of the messages in the multi-

function 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 Take note of the messages in the multi-

function display.

왘 Have the Advanced 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.

391

Your vehicle has also been equipped with a TPMS malfunction telltale to indicate when the system is not operating properly. When the malfunction telltale is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS mal- functions may occur for a variety of reasons, including the installation of incompatible replacement tires on the vehicle. Always check the TPMS malfunction telltale after replacing one or more tires on your vehicle to ensure that the replacement tires are compatible with the TPMS.

Practical hints What to do if …

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 vehicle placard or the tire inflation pressure label. (If your vehicle has tires of a different size than the size indicated on the vehicle placard or the tire inflation pressure label, you should consult the appropriate section of this owner’s manual to determine the proper tire inflation pressure). When the low tire pressure telltale is illuminated, one or more of your tires is significantly under-in- flated. You should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly under-inflated tire causes the tire to over- heat and can lead to tire failure. Under-infla- tion also reduces fuel efficiency and tire tread life, and may affect the vehicle’s han- dling and stopping ability.

392

Possible cause 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 note any messages in the

multifunction display and follow cor- rective steps (컄 page 401).

Lamp in center console

Problem 59 The front passenger front air bag off indicator lamp illuminates and remains illuminated with the weight of a typical adult or someone 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.

393

Practical hints What to do if …

Problem 59 The front passenger front air bag off indicator lamp does not illuminate 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 passen- ger seat.

Possible cause The system is malfunctioning. 왘 Make sure there is nothing between seat cushion and child seat and check installation of the child seat.

Suggested solution

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 possible by an authorized Mercedes-Benz Light Truck Center. Do not transport a child on the front passenger seat until the system has been repaired. 왘 Also note any messages in the multifunction display

and follow corrective steps (컄 page 401).

Warning!

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

394

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 159) 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 24) 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 24) or button j, k, ÿ, or è on the multifunction steering wheel. They are then stored in the vehicle status message memory (컄 page 159). 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.

Warning!

No messages will be displayed if either the instrument cluster or the multifunction dis- play is inoperative.

Contact the nearest authorized Mercedes-Benz Light Truck Center.

395

Practical hints What to do if …

Switching on the ignition causes all instrument cluster lamps (except low beam headlamp indicator lamp, high beam headlamp indicator lamp, and turn signal indicator lamps unless acti- vated) as well as the multifunction dis- play to come on. Make sure the lamps and multifunction display are in work- ing 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 397) 앫 Symbol messages (컄 page 407)

396

Text messages

Display message ABS

Malfunction Visit workshop

Possible cause The ABS has detected a malfunction and has switched off. The ESP® and the BAS are also deactivated. The brake system is still functioning normally but without the ABS avail- able.

Display malfunction Visit workshop

The ABS or the ABS display is mal- functioning.

Practical hints What to do if …

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 accident. 왘 Continue driving with added caution.

Wheels may lock during hard braking, re- ducing 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 accident.

397

Practical hints What to do if …

Display message ABS

unavailable See Operator’s Manual

Battery protection

Convenience functs. Temporarily Unavailable

Please note: Convenience Functions

Available again Drive to workshop

Cruise control

DSR

398

Possible cause The ABS was deactivated because of insufficient power supply. The charg- ing voltage has fallen below ten volts. The brake system is still functioning normally but without the ABS available.

The battery has insufficient voltage and can no longer supply conve- nience functions such as the rear window defroster. On-board voltage is sufficient; the consumers will switch on again. Cruise control is malfunctioning.

Possible solution 왘 Switch off electrical consumers that are currently not needed, e.g. seat heating*.

왘 If necessary, have the generator

(alternator) and the battery checked.

When the voltage is above this value again, the ABS is operational again and the message in the multifunction display should disappear. As soon as the on-board voltage is sufficient, the consumers will switch on again.

왘 Have cruise control checked by an

authorized Mercedes-Benz Light Truck Center.

왘 Have the Downhill Speed Regulation

checked by an authorized Mercedes-Benz Light Truck Center.

Malfunction

Downhill Speed Regulation is malfunctioning.

Display message ESP

unavailable See Operator’s Manual

Malfunction Visit workshop

Practical hints What to do if …

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

If the yellow ESP® warning lamp v flashes while driving and this message appears, the electron- ic traction system has switched off to prevent overheating of the drive wheel brakes. The self-diagnosis has not yet been completed.

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.

Possible solution 왘 Continue driving with added caution. 왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

Failure to follow these instructions increases the risk of accident. As soon as the brakes have cooled off, the electronic traction system switches on again. The message in the multifunction display disap- pears and the ESP® warning lamp v go out.

The display will clear after driving a short dis- tance at a vehicle speed of above 12 mph (20 km/h). 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.

399

Practical hints What to do if …

Display message ESP

Display malfunction Visit workshop

Gear selector lever in park position

Please move gear selector lever to N or P

400

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

You have attempted to turn off the engine with the KEYLESS-GO* start/stop button with the gear selector lever not in P. You have opened the driver’s door with the gear selector lever not in P. You have attempted to start the en- gine with the KEYLESS-GO* start/stop button while the gear selector lever was in position R or D.

Possible solution 왘 Continue driving with added caution. 왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

Failure to follow these instructions increases the risk of accident. 왘 Select gear position P using the gear

selector lever.

왘 Select gear position P or N using the gear

selector lever. Make sure the brake pedal is depressed when attempting to start the engine with the KEYLESS-GO* start/stop button.

Display message Front passenger airbag activated see Oper.’s Man.

Possible cause 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. Ob- jects on the seat or forces act- ing on the seat may make the system sense supplemental 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 Switch off the ignition (컄 page 34). 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 passen- ger 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 recognize such forces as supplemental weight and sense that an oc- cupant on the front passenger seat is of a greater weight than actu- ally present.

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

switch on the ignition (컄 page 34). (Continued on next page)

401

Practical hints What to do if …

Display message Front passenger airbag activated see Oper.’s Man.

Possible cause

Possible solution Monitor the 59 indicator lamp on the center console (컄 page 27) and the multifunction display in the instrument cluster (컄 page 24) 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 81) has deactivated the air bag.

앫 the message Front passenger airbag activated see Oper.’s Man. or the message Front passenger airbag deactivated see Oper.’s Man. should not appear in the multifunction display at any time the seat is unoccupied. Wait at last 60 seconds for the system to complete the necessary check cy- cles 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 81), 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 correc- tive 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.

402

Display message Front passenger airbag deactivated see Oper.’s Man.

Possible cause 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 Switch off the ignition (컄 page 34). 왘 Have the front passenger vacate the seat and exit the vehicle. 왘 Adjust the seat in a height position (컄 page 39). 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 34).

(Continued on next page)

403

Practical hints What to do if …

Display message Front passenger airbag deactivated see Oper.’s Man.

Possible cause

Possible solution Monitor the 59 indicator lamp on the center console (컄 page 27) and the multifunction display in the instrument cluster (컄 page 24) 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 81) has deactivated the air bag.

앫 the message Front passenger airbag activated see Oper.’s Man. or the message Front passenger airbag deactivated see Oper.’s Man. should not appear in the multifunction display at any time the seat is unoccupied. Wait at last 60 seconds for the system to complete the necessary check cy- cles 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 81), 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 performing the above corrective steps, do not have any

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

404

Practical hints What to do if …

Display message Run Flat Indicator inactive Check tires Then reactivate Run Flat Indicator

Run Flat Indicator unavailable Tire pressure Check tires

Possible cause Run Flat Indicator is malfunctioning. 왘 Have the Run Flat Indicator checked by an authorized

Possible solution

There was a warning message about a loss in the tire inflation pressure and the Run Flat Indicator has not been reactivated yet. The Run Flat Indicator has been switched off due to an error. The Run Flat Indicator indicates that the pressure is too low in one or more tires.

Mercedes-Benz Light Truck Center.

왘 Make sure that the correct tire inflation pressure is set

for each tire.

왘 Then reactivate the Run Flat Indicator.

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 sit- uation around you.

왘 Check and adjust tire inflation pressure as required

(컄 page 348).

왘 If necessary, change the wheel (컄 page 457). 왘 Reactivate the Run Flat Indicator after adjusting the tire

inflation pressure values (컄 page 350).

405

Practical hints What to do if …

Display message Tire pressure display appears after driving several minutes Tire pressure monitor inoperative Tire pres. monitor inoperative No wheel sensors

Tire pres. monitor Wheel sensor missing

Possible cause The tire inflation pressure is being checked. 왘 Drive the vehicle for a few minutes.

Possible solution

The Advanced TPMS* is malfunctioning.

왘 Have the Advanced TPMS* checked by an autho-

rized Mercedes-Benz Light Truck Center.

There are wheels without wheel sensors mounted (e.g. winter tires).

왘 Have the Advanced TPMS* checked by an autho-

rized Mercedes-Benz Light Truck Center.

왘 Have the wheel sensors install 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 install by an authorized

Mercedes-Benz Light Truck Center. The tire pressure for the respective tire is not shown in the multifunction display.

왘 As soon as the causes of the malfunction have been

removed, the Advanced TPMS* automatically be- comes active again after a few minutes driving.

One or more sensors defect (e.g. battery in one or more wheel sensor is empty). One or more wheels without wheel sensors mounted (e.g. spare tire).

Tire pres. monitor temporarily unavailable

The Advanced TPMS* is unable to monitor the tire pressure due to 앫 a nearby radio interference source. 앫 excessive wheel sensor temperatures.

406

Symbol messages

Display symbol

Display messages Undervoltage Switch off consumers malfunction Visit workshop Battery/Alternator Stop vehicle

Practical hints What to do if …

Possible cause The battery has insufficient volt- age. The battery was charged with a battery charger or jump started. The battery is no longer charg- ing. Possible causes: 앫 alternator malfunctioning 앫 broken poly-V-belt Do not forget that the brake sys- tem requires electrical energy and may be operating with re- stricted capability. Considerably greater brake pedal force is required and the stopping dis- tance is increased.

Possible solution 왘 Turn off unnecessary electrical

consumers.

왘 Have the battery checked at a service

station.

왘 Stop immediately and 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. Notify an authorized Mercedes-Benz Light Truck Center.

If it is intact: 왘 Drive immediately to the nearest autho- rized Mercedes-Benz Light Truck Center. Adjust driving to be consistent with re- duced braking responsiveness.

407

Practical hints What to do if …

Display symbol

Display message Brake wear Visit workshop

Possible cause The brake pads have reached their wear limit.

Possible solution 왘 Brake pad thickness must be visually in- spected at the intervals specified in the Maintenance Booklet.

왘 Have the brake pads replaced as soon as

possible.

; (USA only) 3 (Canada only)

Changed braking behavior Drive with extreme care

A malfunction in the Electronic Brake Proportioning (컄 page 98) was detected.

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

왘 Read and observe messages in the dis-

play.

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.

408

Practical hints What to do if …

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

Display message Release parking brake

Possible cause You are driving with the parking brake set.

Possible solution 왘 Release the parking brake (컄 page 52).

Brake fluid too low Visit workshop

There is insufficient brake fluid in the reservoir.

Warning!

Driving with the message Brake fluid too low Visit workshop 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 can be seriously burned.

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.

왘 Risk of accident! Stop the vehicle and no-

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

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

409

Practical hints What to do if …

Display symbol ? (USA only) ± (Canada only)

Display messages Visit workshop

Coolant Check level

Possible cause There may be a malfunction in the: 앫 Fuel injection system 앫 Ignition system 앫 Exhaust system 앫 Fuel system The coolant level is too low.

Possible solution 왘 Have the measuring system checked by an authorized Mercedes-Benz Light Truck Center.

왘 Add coolant (컄 page 332). 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 can 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 en- gine damage.

410

Practical hints What to do if …

Display symbol Ï

Display messages Coolant Stop, engine off

Possible cause The coolant is too hot.

Possible solution 왘 Stop the vehicle and immediately turn off

the engine.

왘 Only start the engine again after the mes-

sage disappears. You could otherwise damage the engine.

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!

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

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

Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.

411

Practical hints What to do if …

Display symbol Ï

Display messages Coolant Stop, engine off

Possible cause The poly-V-belt could be broken. 왘 Stop the vehicle and immediately turn off

Possible solution

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. Notify 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.

왘 Drive immediately to the nearest autho- rized Mercedes-Benz Light Truck Center. 왘 Observe the coolant temperature gauge

in the instrument cluster.

왘 Have the fan replaced as soon as possi-

ble.

Coolant Visit workshop

The cooling fan for the coolant is malfunctioning.

412

Display symbol

Display messages Display malfunction Visit workshop

Possible cause The instrument cluster display is malfunctioning.

±

Display malfunction Visit workshop

Doors open Door open

The displays for several systems have malfunctioned. Some sys- tems themselves may also have malfunctioned. Certain electronic systems are unable to relay information to the control system. The follow- ing systems may have failed: 앫 Coolant temperature display 앫 Tachometer 앫 Cruise control display You are attempting to drive with one or more doors open.

Practical hints What to do if …

Possible solution 왘 Continue driving with added caution. 왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Have the electronic systems checked by an authorized Mercedes-Benz Light Truck Center.

왘 Have the electronic systems checked by an authorized Mercedes-Benz Light Truck Center.

왘 Close the doors.

413

Practical hints What to do if …

Display symbol

Display messages Check eng. oil level when next refueling

Possible cause The engine oil level is too low.

USA only: Add 1 qt. engine oil when next refueling Canada only: Add 1 liter engine oil when next refueling Engine oil level Stop, engine off

The engine oil level is too low.

There is no oil in the engine. There is a danger of engine dam- age.

Engine oil level Reduce oil level

You have added too much en- gine oil. There is a risk of damag- ing the engine or the catalytic converter.

Possible solution 왘 Check the engine oil level (컄 page 328) (ML 500 only), or (컄 page 330) (ML 350 only).

왘 Add engine oil (컄 page 331) and check

the engine oil level (컄 page 328) (ML 500 only), or (컄 page 330) (ML 350 only).

왘 Carefully bring the vehicle to a halt as

soon as possible.

왘 Turn off the engine. 왘 Add engine oil (컄 page 331) and check

the engine oil level (컄 page 328) (ML 500 only), or (컄 page 330) (ML 350 only).

왘 Have oil siphoned or drained off. Observe all legal requirements with respect to its disposal.

414

Display symbol

Display messages Engine oil level Visit workshop

Possible cause The engine oil has dropped to a critical level.

Oil sensor malfunction Visit workshop

The measuring system is mal- functioning.

Practical hints What to do if …

Possible solution 왘 Check the engine oil level (컄 page 328) (ML 500 only), or (컄 page 330) (ML 350 only) and add oil as required (컄 page 331).

왘 If you must add engine oil frequently, have

the engine checked for possible leaks.

왘 Have the measuring system checked by an authorized Mercedes-Benz Light Truck Center.

When the Add 1 qt. engine oil when next refueling (Canada: 1 liter) mes- sage appears while the engine is running and at operating temperature, 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 ap- proved oil specified in the Factory Approved Service Products pamphlet.

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

415

Practical hints What to do if …

Display symbol

Display messages Reserve fuel

Check gas cap See Operator’s Manual

Hood open Trunk open Key Check battery

Please do not forget key

416

Possible cause The fuel level has dropped below the reserve mark. A loss of pressure has been de- tected in the fuel system. The fuel cap may not be closed prop- erly or the fuel system may be leaky.

You are driving with the hood or the tailgate open. The SmartKey with KEYLESS-GO* batteries are discharged. This display appears (for a maxi- mum of 60 seconds) if the driv- er’s door is opened with the engine shut off and no SmartKey in the starter switch. This message is only a reminder.

Possible solution 왘 Refuel at the next gas station

(컄 page 323).

왘 Check the fuel cap (컄 page 323). If it is not closed properly: 왘 Close the fuel cap. If it is closed properly: 왘 Have the fuel system checked by an au- thorized Mercedes-Benz Light Truck Cen- ter.

왘 Close the hood (컄 page 326) or the tail-

gate (컄 page 120).

왘 Change the batteries (컄 page 440).

왘 Insert SmartKey in the starter switch. 왘 Take the SmartKey with KEYLESS-GO*

with you when leaving the vehicle.

Display symbol

Display messages Key not detected

Key not detected

Remove key

Replace key Drive to workshop

Practical hints What to do if …

Possible cause The SmartKey with KEYLESS-GO* is not recognized while the engine is running be- cause 앫 the SmartKey with

KEYLESS-GO* is not in the vehicle

앫 there is strong radio-fre-

quency interference

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

You have forgotten to remove the SmartKey. There is no additional code avail- able for SmartKey or SmartKey with KEYLESS-GO*.

Possible solution 왘 Stop the vehicle as soon as it is safe to do

so.

왘 Search for the SmartKey.

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 in

the vehicle.

왘 Operate the vehicle with the SmartKey in

the starter switch if necessary.

왘 Remove the SmartKey from the starter

switch.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

417

Practical hints What to do if …

Display symbol

Display messages 3rd brake lamp

Brake lamp, left Substitute bulb on

Brake lamp, right Substitute bulb on

Display malfunction Visit workshop Front foglamp, left Front foglamp, right Rear foglamp, left Rear foglamp, right

418

Possible cause The high mounted brake lamp is malfunctioning. This message will only appear if all light emit- ting diodes have stopped work- ing. The left brake lamp is malfunc- tioning. A substitute bulb is be- ing used. The right brake lamp is malfunc- tioning. A substitute bulb is be- ing used. The display for the lamps or the system is malfunctioning. The left front fog lamp is mal- functioning. The right front fog lamp is mal- functioning. The left rear fog lamp is malfunc- tioning. The right rear fog lamp is mal- functioning.

Possible solution 왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center 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.

왘 Replace the bulb as soon as possible.

Practical hints What to do if …

Display symbol

Display messages Active headlamp currently unavailable Active headlamps Substitute bulb on

Active headlamps inoperative Active headlamps Display malfunction High beam, left High beam, right License plate lamp, left License plate lamp, right

Possible cause The active Bi-Xenon* headlamps system is malfunctioning. The active Bi-Xenon* headlamps system is malfunctioning. An- other light is being used. The active Bi-Xenon* headlamps system is malfunctioning. The active Bi-Xenon* headlamp system is malfunctioning. The left high beam lamp is mal- functioning. The right high beam lamp is mal- functioning. The left license plate lamp is malfunctioning. The right license plate lamp is malfunctioning.

Possible solution 왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center 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.

왘 Replace the bulb as soon as possible.

419

Practical hints What to do if …

Display symbol

Display messages Light sensor Drive to workshop

Possible cause The lamp sensor is malfunction- ing. The headlamps switch on automatically.

Possible solution 왘 In the control system, set lamp operation

to manual mode.

왘 Switch on headlamps using the exterior

Low beam, left Low beam, right Marker lamp, front left Marker lamp, front right Parking lamp, front left Substitute bulb on

Parking lamp, front right Substitute bulb on

The left low beam lamp is mal- functioning. The right low beam lamp is mal- functioning. The front left side marker lamp is malfunctioning. The front right side marker lamp is malfunctioning. The left parking lamps are mal- functioning. A substitute bulb is being used. The right parking lamps are mal- functioning. A substitute bulb is being used.

lamp switch.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Replace the bulb as soon as possible.

왘 Replace the bulb as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

420

Practical hints What to do if …

Display symbol

Display messages Reverse lamp, left Reverse lamp, right Switch off lights

Tail lamp, left Substitute bulb on

Tail lamp, right Substitute bulb on

Possible cause The left reverse light is malfunc- tioning. The right reverse light is mal- functioning. Lamps have been turned on al- though the SmartKey in the starter switch is in position 0. The left tail lamp is malfunction- ing. A substitute bulb is being used. The right tail lamp is malfunc- tioning. A substitute bulb is be- ing used.

Possible solution 왘 Replace the bulb as soon as possible.

왘 Replace the bulb as soon as possible.

왘 Switch off the headlights.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

왘 Visit an authorized Mercedes-Benz Light

Truck Center as soon as possible.

421

Practical hints What to do if …

Display symbol

Display messages Turn signal, rear left Substitute bulb on

Turn signal, rear right Substitute bulb on

Turn signal, front left Substitute bulb on

Turn signal, front right Substitute bulb on

Turn signal in mirror, left

Turn signal in mirror, right

422

Possible cause The left rear turn signal lamp is malfunctioning. A substitute bulb is being used. The right rear turn signal lamp is malfunctioning. A substitute bulb is being used. The left front turn signal lamp is malfunctioning. A substitute bulb is being used. The right front turn signal lamp is malfunctioning. A substitute bulb is being used. The left turn signal in the side mirror is malfunctioning. This message will only appear if all light emitting diodes have stopped working. The right turn signal in the side mirror is malfunctioning. This message will only appear if all light emitting diodes have stopped working.

Possible solution 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.

왘 Have the LEDs replaced as soon as possi-

ble.

왘 Have the LEDs replaced as soon as possi-

ble.

Practical hints What to do if …

Display symbol

Display messages Please rectify tire pressure Caution Tire defect

Possible cause The pressure is too low in one or more tires. One or more tires are deflating. The respective tire is shown in the multifunction display.

Possible solution 왘 Check and correct tire inflation pressure as

required.

왘 Carefully bring the vehicle to a halt, avoiding

abrupt steering and braking maneuvers.

왘 If necessary, change the wheel.

Warning!

Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up and possibly a fire.

423

Possible cause The tire pressure in one or more tires is already below the minimum value. The respective tire is shown in the multifunction display.

Possible solution 왘 Carefully bring the vehicle to a halt, avoiding abrupt steering and braking maneuvers.

왘 Check and adjust tire pressure as

required.

왘 If necessary, change the wheel.

Practical hints What to do if …

Display symbol

Display messages Check tires

Warning!

Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle.

You may lose control of the vehicle. Contin- ued driving with a flat tire will cause exces- sive heat build-up and possibly a fire.

424

Practical hints What to do if …

Display symbol

Display messages Seat belt system Drive to workshop

Possible cause The seat belt system is malfunctioning. 왘 Visit an authorized Mercedes-Benz Light Truck Center as soon as possi- ble.

Possible solution

Service memory full See Operator’s Manual

The maintenance service memory cannot save any more data.

Close tilt/sliding sunroof

Close tilt/sliding sunroof

You have opened the driver’s door with the SmartKey removed from the starter switch and the sliding portion of the tilt/sliding sunroof* open. You have opened the driver’s door with the SmartKey removed from the starter switch and the tilt portion of the tilt/sliding sunroof* open.

왘 Have the service memory checked by

an authorized Mercedes-Benz Light Truck Center.

왘 Close the tilt/sliding sunroof*

(컄 page 235).

왘 Close the tilt/sliding sunroof*

(컄 page 235).

425

Practical hints What to do if …

Display symbol

Display messages Malfunction Drive to workshop

Possible cause One or more main functions of the Tele Aid* system are malfunctioning.

Battery Drive to workshop

Restraint sys. malfunction Drive to workshop

The emergency power battery for the Tele Aid* system is malfunctioning. If the vehicle battery is also dead, Tele Aid* will not be operational. The system is malfunctioning.

Possible solution 왘 Have the Tele Aid* system checked

by an authorized Mercedes-Benz Light Truck Center.

왘 Have the Tele Aid* system checked

by an authorized Mercedes-Benz Light Truck Center.

왘 Drive with added caution to the near- est 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 immediately to have the system checked; otherwise the SRS may not