2010 Mercedes-benz CLS Class Owners Manual

Possible causes/consequences and X Solutions The trunk is open. X Close the trunk (Y page 72). You are driving with the hood open. X Stop the vehicle in a safe location as soon as it is safe to

do so.

X Close the hood (Y page 179). There is otherwise danger of an accident. You are driving with at least one door open. X Close all doors. A SmartKey with KEYLESS-GO left in the vehicle was recognized while trying to lock the vehicle from the outside. X Take the SmartKey out of the vehicle. This message appears for a maximum of 60 seconds if the driver’s door is opened with the engine turned off and no SmartKey in the starter switch. This message is only a reminder. X Take the SmartKey with you when leaving the vehicle.

+ Remove Key You have forgotten to remove the SmartKey. + Please get a new key. + Change Key Batteries

X Remove the SmartKey from the starter switch. The SmartKey is malfunctioning. X Contact an authorized Mercedes-Benz Center.

The batteries in the SmartKey with KEYLESS-GO are discharged. X Replace the batteries (Y page 264).

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242 Vehicle status messages in the multifunction display

Display messages + Key Not Detected (message appears in red)

+ Key Not Detected (message appears in red)

+ Key Not Detected (message appears in white) Ready

~ Bluetooth

¥ Top Up Washer Fluid

Possible causes/consequences and X Solutions The SmartKey with KEYLESS-GO is not detected while the engine is running because the SmartKey is not in the vehicle. X Stop the vehicle as soon as it is safe to do so. X Engage the parking brake. X Search for the SmartKey.

The vehicle cannot be locked centrally nor can the engine be started again after the engine is stopped.

The SmartKey with KEYLESS-GO is not detected while the engine is running because there is strong radio-frequency interference. X Stop the vehicle as soon as it is safe to do so. X Engage the parking brake. X Operate the vehicle with the SmartKey in the starter switch. The SmartKey with KEYLESS-GO is momentarily not detected. X Change the position of the SmartKey in the vehicle. X Operate the vehicle with the SmartKey in the starter switch

if necessary.

The telephone has not yet been connected to the COMAND system via Bluetooth®. X Connect the telephone to the COMAND system via

Bluetooth®.

The fluid level has dropped to approximately 1/3 of total reservoir capacity. X Add washer fluid (Y page 181).

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Engine

Engine Service

Display messages (USA only) (Canada only)

; Display Malfunctio Service Required + Top Up Coolant See Operator’s Man.

Possible causes/consequences and X Solutions There may be a malfunction in Rthe fuel management system Rthe ignition system Rthe exhaust system Rthe fuel system X Have the engine checkedas soon as possible at an

authorized Mercedes-Benz Center.

Certain electronic systems are unable to relay information to the control system. The coolant temperature display or the tachometer may have failed. X Have the electronic systems checked at an authorized

Mercedes-Benz Center.

The coolant level is too low. X Add coolant (Y page 180). X If you have to add coolant frequently, have the cooling

system checked at an authorized Mercedes-Benz Center.

G 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.

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244 Vehicle status messages in the multifunction display

Display messages ? Coolant Stop Vehicle, turn engine off.

Possible causes/consequences and X Solutions The coolant is too hot. X Stop the vehicle immediately as soon as it is safe to do so. X Turn off the engine immediately. X Engage the parking brake. X Only start the engine again after the message disappears.

You could otherwise damage the engine.

X Observe the coolant temperature indicator in the

instrument cluster.

X If the temperature rises again: Contact an authorized

Mercedes-Benz Center immediately.

During severe operation conditions and stop-and-go city traffic, the coolant temperature may rise close to 248‡ (120†).

G Warning! 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. Steam from an overheated engine can cause serious burns which can occur just by opening the engine 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.

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

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Display messages ? Coolant Stop Vehicle, turn engine off.

Possible causes/consequences and X Solutions The poly-V-belt could be broken. X Stop the vehicle immediately as soon as it is safe to do so. X Turn off the engine immediately. X Check the poly-V-belt. X If it is broken: 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 Center.

X If it is intact: 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 Limited Warranty.

X Observe the coolant temperature indicator in the

instrument cluster.

X Drive to the nearest authorized Mercedes-Benz Center

immediately.

The radiator cooling fan is malfunctioning. X Observe the coolant temperature indicator in the

instrument cluster. If the coolant temperature is below 248‡ (120†), you may continue driving to an authorized Mercedes-Benz Center. X Avoid placing heavy loads on the engine (e.g. by driving

uphill) as well as stop-and-go traffic.

X Have the fan replaced as soon as possible. The battery is no longer charging. Possible causes: Ralternator malfunctioning Rbroken poly-V-belt Ra malfunction in the electronic system X Stop immediately in a safe location or as soon as it is safe

to do so and check the poly-V-belt.

X If it is broken: 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 Center.

X If it is intact: Drive to the nearest authorized Mercedes- Benz Center immediately. Adjust driving to be consistent with reduced braking responsiveness.

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246 Vehicle status messages in the multifunction display

Display messages # Low Voltage Start Engine 4 Check oil level at next refueling.

Possible causes/consequences and X Solutions The battery has insufficient voltage. X Start the engine.

The engine oil has dropped to a critical level. X Check the engine oil level (Y page 179) and add engine oil

as required (Y page 180).

X If you must add engine oil frequently, have the engine

checked for possible leaks.

If the message Check oil level at next refueling. appears while the engine is running and at operating temperature, the engine oil level has dropped to approximately the minimum level. The message will be stored in the vehicle status message memory after you have cleared it from the multifunction display. Visually check for oil leaks. If there are no obvious oil leaks, drive to the nearest service station to refill your engine oil to the required level. Display messages 7 Reserve 7 Gas Cap Is Open

Fuel

For information on approved engine oils contact an authorized Mercedes-Benz Center or visit www.mbusa.com (USA only). ! 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.

Possible causes/consequences and X Solutions The fuel level is low. X Refuel at the next gas station. The fuel level has dropped below the reserve mark. X Refuel at the next gas station. 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 leaking. X Check the fuel cap (Y page 177). X If it is not closed properly: Close the fuel cap. X If it is closed properly: Have the fuel system checked at

an authorized Mercedes-Benz Center.

¸ Replace

Air Filter The air filter is clogged.

X Have the air filter checked at an authorized Mercedes-Benz

Center.

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Lamps

Display messages b Active

Headlamps Inoperativ b Active Headlamps Auxiliary Bulb On b Reverse Lamp Left orReverse Lamp Right b Brake-/ Tail Lamp Left Auxiliary Bulb On orBrake-/ Tail Lamp Right Auxiliary Bulb On b 3rd Brake Lamp

b Front Foglamp Left orFront Foglamp Right

Possible causes/consequences and X Solutions The active Bi-Xenon headlamp system is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The active Bi-Xenon headlamps are malfunctioning. Another light is being used. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The left or right backup lamp is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The left or right brake/tail lamp is malfunctioning. This message will only appear if all LEDs have stopped working. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The high-mounted brake lamp is malfunctioning. This message will only appear if all LEDs have stopped working. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The left or right front fog lamp is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

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248 Vehicle status messages in the multifunction display

Display messages b Marker Lamp Front Left orMarker Lamp Front Right b Parking Lamp Front Left Auxiliary Bulb On orParking Lamp Front Right Auxiliary Bulb On b High Beam Left orHigh Beam Right b License Plate Lamp Left orLicense Plate Lamp Right b AUTO- Light Inoperativ

Possible causes/consequences and X Solutions The front left side or right side marker lamp is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The left or right front parking lamp is malfunctioning. A substitute bulb is being used. X Halogen headlamp: Replace the bulb as soon as possible

(Y page 266).

X Bi-Xenon headlamp: Contact an authorized Mercedes-

Benz Center as soon as possible.

The left or right high-beam lamp is malfunctioning. X Replace the bulb as soon as possible (Y page 266).

The left or right license plate lamp is malfunctioning. X Replace the bulb as soon as possible (Y page 266).

The light sensor is malfunctioning. The headlamps come on automatically. X Contact an authorized Mercedes-Benz Center as soon as

possible.

To switch off the headlamps (U.S. vehicles only): X In the control system, set daytime running lamp mode to

X Switch off the headlamps using the exterior lamp switch

manual (Y page 121).

(Y page 87).

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Display messages b Low Beam Left orLow Beam Right

b Rear Left

Foglamp b Switch

Possible causes/consequences and X Solutions The left or right low-beam lamp is malfunctioning. X Halogen headlamp: Replace the bulb as soon as possible

(Y page 266).

X Bi-Xenon headlamp: Contact an authorized Mercedes-

Benz Center as soon as possible.

The rear fog lamp is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

Off Lights You have removed the SmartKey from the starter switch, opened the driver’s door and left the headlamps on or removed the SmartKey with KEYLESS-GO from the vehicle and left the headlamps on. X Turn the exterior lamp switch to $ or Ã

b Tail Lamp Left Auxiliary Bulb On orTail Lamp Right Auxiliary Bulb On b Cornering Lamp Left orCornering Lamp Right b Rear Left Turn Signal orRear Right Turn Signal

(Y page 87).

or X With the rear fog lamp switched on: Push in the exterior

lamp switch to its stop.

The left or right tail lamp is malfunctioning. A substitute bulb is being used. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The left or right corner-illuminating front fog lamp is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

The left or right rear turn signal lamp is malfunctioning. X Contact an authorized Mercedes-Benz Center as soon as

possible.

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250 Vehicle status messages in the multifunction display

Display messages b Front Left Turn Signal orFront Right Turn Signal b Left Mirror Turn Signal orRight Mirror Turn Signal

Tires

Display messages h Please correct the tire pressure.

h Tire Pressure Caution Tire Defect h Tire Pressure Check Tires

Possible causes/consequences and X Solutions The left or right front turn signal lamp is malfunctioning. X Replace the bulb as soon as possible (Y page 266).

The turn signal in the left or right exterior rear view mirror is malfunctioning. This message will only appear if all LEDs have stopped working. X Contact an authorized Mercedes-Benz Center as soon as

possible.

Possible causes/consequences and X Solutions The tire inflation pressure is too low in at least one tire. or The tire inflation pressure of the individual tires differ from each other significantly. X Check and correct tire inflation pressure as required

(Y page 185).

At least one tire is deflating. X Carefully bring the vehicle to a halt, avoiding abrupt

steering and braking maneuvers.

X If necessary, change the wheel (Y page 271).

The tire inflation pressure in at least one tire is significantly below the reference value. X Carefully bring the vehicle to a halt, avoiding abrupt

steering and braking maneuvers.

X Check and adjust tire inflation pressure as required. X If necessary, change the wheel (Y page 271).

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G 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.

G Warning! Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are more likely to fail from being overheated. Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are more likely to become punctured or damaged by road debris, potholes etc.

What to do if … Lamps in instrument cluster Notes If any of the following lamps in the instrument cluster fails to come on during the bulb self- check when switching on the ignition, have the respective bulb checked and replaced if necessary.

When you switch on the ignition, all lamps in the instrument cluster come on. The low- beam headlamp indicator lamp, high-beam headlamp indicator lamp, and turn signal indicator lamps will only come on if activated. If a lamp in the instrument cluster fails to come on when the ignition is switched on, have it checked and replaced if necessary.

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252 What to do if …

Brake

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

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Possible causes/consequences and X Solutions The ABS has detected a malfunction and switched off. The BAS, the ESP®, the EBP, and the PRE-SAFE® system are also switched off. The brake system is still functioning normally but without the systems specified above available. If the ABS control unit is malfunctioning, other systems such as the navigation system or the automatic transmission may also be malfunctioning. X Continue driving with added caution. Wheels may lock during

hard braking, reducing steering capability.

X Adjust driving to be consistent with reduced braking

responsiveness.

X Read and observe messages that may appear in the

multifunction display (Y page 228).

X Have the system checked at an authorized Mercedes-Benz

Center as soon as possible.

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

Failure to follow these instructions increases the risk of an accident. The ABS has switched off due to insufficient power supply. The battery might not be charged sufficiently. When the voltage is above the required value again, the ABS is operational again. The ABS indicator lamp should go out. X Continue driving with added caution. Wheels may lock during

hard braking, reducing steering capability.

X Adjust driving to be consistent with reduced braking

responsiveness.

X Read and observe messages that may appear in the

multifunction display (Y page 228).

X If the ABS indicator lamp does not go out: Have the alternator

and the battery checked.

You are driving with the parking brake engaged. X Release the parking brake.

$ (USA only) J (Canada only) The red brake warning lamp comes on while driving and an acoustic warning sounds.

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Problem $ (USA only) J (Canada only) The red brake warning lamp comes on while the engine is running and an acoustic warning sounds.

Possible causes/consequences and X Solutions There is insufficient brake fluid in the reservoir. Risk of accident! X Do not drive any further. Stop the vehicle in a safe location as

soon as it is safe to do so. X Engage the parking brake. X Read and observe messages that may appear in the

multifunction display (Y page 228).

X Contact an authorized Mercedes-Benz Center. Do not add brake fluid! This will not solve the problem.

G Warning! Driving with the brake warning lamp illuminated 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 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.

Possible causes/consequences and X Solutions The seat belt telltale reminds you and your passengers to fasten your seat belts before driving off. X Fasten your seat belts. Regardless of whether the seat belts are fastened or not, the seat belt telltale always comes on and remains lit for 6 seconds after starting the engine.

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

The warning chime stops sounding.

Safety systems

Problem 7 The red seat belt

telltale comes on for a maximum of 6 seconds after starting the engine.

7 The red seat belt

telltale comes on. In addition you hear a warning chime for a maximum of 6 seconds after starting the engine.

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254 What to do if …

Problem 7 The red seat belt

telltale comes on while the vehicle is standing still and the engine is running or while driving.

7 The red seat belt

telltale flashes while driving. In addition, an intermittent warning chime sounds with increasing intensity.

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Possible causes/consequences and X Solutions You and/or your front passenger have forgotten to fasten your seat belts. X Fasten your seat belts.

The seat belt telltale goes out.

There are items placed on the front passenger seat and therefore the system senses the front passenger seat as being occupied. X Remove the items from the front passenger seat and put them

in a safe place. The seat belt telltale goes out.

The vehicle’s speed once exceeded 15 mph (25 km/h) and you and/or your front passenger have forgotten to fasten your seat belts. X Fasten your seat belts.

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

There are items placed on the front passenger seat and therefore the system senses the front passenger seat as being occupied. X Remove the items from the front passenger 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 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 vehicle is standing still and a front door is opened. Problem + The red SRS

Possible causes/consequences and X Solutions There is a malfunction in the restraint systems. The air bags or Emergency Tensioning Devices (ETDs) could deploy unexpectedly or fail to activate in an accident. X Drive with added caution to the nearest authorized Mercedes-

indicator lamp comes on while driving.

Benz Center.

G Warning! In the event a malfunction of the SRS is indicated as outlined above, the SRS may not be operational.

For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Center immediately 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

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might deploy unexpectedly and unnecessarily which could also result in injury.

Problem d The yellow ESP®

warning lamp comes on while the engine is running.

d The yellow ESP®

warning lamp comes on while the engine is running.

d The yellow ESP®

warning lamp flashes while driving.

Possible causes/consequences and X Solutions The ESP® has been switched off. Risk of accident! When the ESP® is switched off it will not stabilize the vehicle if the system recognizes that the vehicle starts to skid or that a wheel is spinning. X Switch the ESP® back on. Exceptions: (Y page 60).

X If leaving the ESP® switched off, adapt your speed and driving

to the prevailing road and weather conditions.

X If the ESP® cannot be switched back on: Have the system

checked at an authorized Mercedes-Benz Center as soon as possible.

The ESP® is not operational due to a malfunction. Risk of accident! X Read and observe additional messages that may appear in the

multifunction display.

X Continue driving with added caution. Wheels may lock during

hard braking, reducing steering capability.

X Adapt your speed and driving to the prevailing road and weather

conditions.

X Have the system checked at an authorized Mercedes-Benz

Center as soon as possible.

The ESP® or the Electronic Traction System (ETS) has come into operation because of detected traction loss in at least one tire. X When driving off, apply as little throttle as possible. X While driving, ease up on the accelerator pedal. X Adapt your speed and driving to the prevailing road and weather

conditions.

X Do not deactivate the ESP®.

Exceptions: (Y page 60).

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

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Driving systems

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Problem · The red distance

warning lamp comes on while driving and an acoustic warning sounds.

Possible causes/consequences and X Solutions You are gaining too rapidly on the vehicle ahead of you or the distance warning system has recognized a stationary obstacle on your probable line of travel. X Apply the brakes immediately. X Carefully observe the traffic situation. You may need to brake

or maneuver to avoid hitting an obstacle.

Vehicle

Problem 6 The yellow fuel

tank reserve warning lamp comes on when the engine is running.

Possible causes/consequences and X Solutions The fuel level has gone below the reserve mark. X Refuel at the next gas station.

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Engine

Problem = (USA only) ; (Canada only) The yellow engine malfunction indicator lamp comes on when the engine is running.

Possible causes/consequences and X Solutions There may be a malfunction in Rthe fuel management system Rthe ignition system Rthe emission control system Rsystems which affect emissions Such malfunctions may result in excessive emissions values and may switch the engine to limp-home (emergency operation) mode. X Have the vehicle checked as soon as possible at an authorized

Mercedes-Benz Center.

i Some states may by law require you to visit a workshop as

soon as the engine malfunction indicator lamp comes on. Check local requirements.

= (USA only) ; (Canada only) The yellow engine malfunction indicator lamp comes on when the engine is running.

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. X Check the fuel cap (Y page 176). X If it is not closed properly: Close the fuel cap. X If it is closed properly: Have the fuel system checked by an

authorized Mercedes-Benz Center.

? The red coolant

temperature warning lamp comes on when the engine is running.

There is insufficient coolant in the reservoir. If this warning lamp comes on frequently, there is a leak in the cooling system. If the coolant level is correct, the electric radiator fan may be broken. X Immediately add coolant to prevent engine from overheating

(Y page 180).

X Have the cooling system checked. X If the coolant temperature is below 248‡ (120†), you can continue driving to the nearest authorized Mercedes-Benz Center.

X Avoid high engine loads (e.g. driving uphill) and stop-and-go

driving.

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Possible causes/consequences and X Solutions The coolant temperature has exceeded 248‡ (120†). X Stop in a safe location as soon as possible and allow the engine

and coolant to cool down.

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258 What to do if …

Problem ? The red coolant

temperature warning lamp comes on when the engine is running and an acoustic warning sounds.

G Warning! 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. Steam from an overheated engine can cause serious burns which can occur just by opening

the engine 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.

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Tires

Problem h USA only:

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

Possible causes/consequences and X Solutions The TPMS (USA only) or Advanced TPMS (Canada only) detects a loss of pressure in at least one tire. X Carefully bring the vehicle to a halt, avoiding abrupt steering and

braking maneuvers. Observe the traffic situation around you.

X Read and observe messages in the multifunction display

(Y page 228).

If the tire inflation pressure in the respective tire(s) has (have) been corrected, the combination low tire pressure/TPMS malfunction telltale goes out after a few minutes of driving.

There is a malfunction in the TPMS. X Read and observe messages in the multifunction display

(Y page 228).

Center.

X Have the TPMS checked at an authorized Mercedes-Benz

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

G Warning! Each tire, including the spare (if provided), should be checked at least once a month when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the Tire and Loading Information placard on the driver’s door B- pillar or the tire inflation pressure label on the inside of 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 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 monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires are significantly underinflated. Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure. Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling and stopping ability. Please note that

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the TPMS is not a substitute for proper tire maintenance, and it is the driver’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. 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 combined 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 subsequent 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 incompatible 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.

Possible causes/consequences and X Solutions The system is malfunctioning. X Have the system checked as soon as possible at an authorized

Mercedes-Benz Center.

X Read and observe messages in the multifunction display and

follow corrective steps (Y page 228).

Lamp in center console Problem

04
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.

G Warning! If the 04 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, do not have any passenger use the front passenger seat until the system has been repaired.

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Problem

04
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 passenger seat.

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Possible causes/consequences and X Solutions The system is malfunctioning. X Make sure there is nothing between seat cushion and child seat

and check installation of the child seat.

X Make sure no objects applying supplemental weight onto the

seat are present.

X 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.

X If the front passenger front air bag off indicator lamp remains

out, have the system checked as soon as possible at an authorized Mercedes-Benz Center. Do not transport a child on the front passenger seat until the system has been repaired. X Read and observe messages in the multifunction display and

follow corrective steps (Y page 228).

G Warning! If the 04 indicator lamp does not illuminate or remains out with the 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.

Unlocking/locking manually Unlocking the vehicle If you cannot unlock the vehicle with the SmartKey or with KEYLESS-GO, unlock the driver’s door and the trunk using the mechanical key. The anti-theft alarm system will trigger when you Runlock the driver’s door or the trunk with

the mechanical key and

Ropen the driver’s door or the trunk To cancel the alarm, insert the SmartKey into the starter switch.

Removing the mechanical key

SmartKey

SmartKey with KEYLESS-GO

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262 Unlocking/locking manually

X Move locking tab : in the direction of

arrow.

X Slide mechanical key ; out of the housing.

Unlocking the driver’s door

X Insert mechanical key ; into the driver’s

door lock.

X Turn mechanical key ; counterclockwise to position 1 until the locking knob moves up. The driver’s door is unlocked.

X Pull the door handle to open the driver’s

door.

X Turn mechanical key ; back and remove

it from the driver’s door lock.

Unlocking the trunk A minimum height clearance of 5.9 ft (1.8 m) is required to open the trunk lid.

X Insert mechanical key : into the trunk lid

lock.

X Turn mechanical key : counterclockwise to position 3 and hold it in this position.

X Pull handle ; and lift the trunk lid. ! When you open the trunk, the trunk lid swings open upwards. Always make sure there is sufficient overhead clearance.

X Turn mechanical key : back and remove

it from the trunk lid lock.

Locking the vehicle If you cannot lock the vehicle with the SmartKey or with KEYLESS-GO, lock it as follows: X Open the driver’s door. X Close the passenger door, the rear doors,

and the trunk.

X Press the central locking switch

(Y page 71).

X Check to see whether the locking knobs on

the doors have moved down.

X If necessary, push them down manually. X Remove the mechanical key from the

SmartKey (Y page 261).

X Check whether the trunk is locked. X If it is not locked, lock it with the

mechanical key (Y page 75). Except for the driver’s door, the vehicle should now be locked.

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X Insert mechanical key ; into the driver’s

door lock.

X Turn mechanical key ; clockwise to

position 1. The driver’s door is locked.

X Turn mechanical key ; back and remove

it from the driver’s door lock.

i This procedure does not arm the anti-

theft alarm system, nor does it lock the fuel filler flap.

Manually unlocking the gear selector lever If the vehicle’s electrical system is malfunctioning, the gear selector lever could remain locked in park position P. In this case the gear selector lever can be unlocked manually, e.g. to tow the vehicle. X Engage the parking brake.

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263

X Pull gear selector lever cover : out and

remove.

X Simultaneously push down release ; and

move the gear selector lever out of park position P. The gear selector lever is unlocked.

i The gear selector lever is locked again as soon as you move it back to park position P.

Fuel filler flap G Warning! Avoid contact with the vehicle walls as they may contain sharp edges. Otherwise, you could injure yourself while releasing the fuel filler flap. In case the central locking system does not release the fuel filler flap, you can open it manually. The fuel filler flap release is located on the passenger side in the trunk behind the side trim panel. X Open the trunk (Y page 71). X Remove side trim panel. i Removing the side trim panel is a

demanding process. We recommend that you contact Roadside Assistance (Y page 166) if you do not feel to have the ability to perform this process.

! Do not use sharp objects to loosen the

gear selector lever cover in the center console, as this could damage the gear selector lever cover or the center console. X Insert a flat, blunt object into the left edge

of gear selector lever cover : at the positions indicated by the arrows.

X Loosen gear selector lever cover : using

this object.

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264 Replacing SmartKey batteries

X Pull fuel filler flap release : in direction of

arrow. The fuel filler flap is unlocked.

X Open the fuel filler flap (Y page 176). X Reinstall side trim panel. X Close the trunk.

Resetting activated NECK-PRO active front head restraints

If the NECK-PRO active front head restraints have been triggered in a rear-end collision, they must be reset. You can tell that the NECK-PRO active front head restraints have been triggered when they have been moved forward and cannot be adjusted. G Warning! For safety reasons, have the NECK-PRO active front head restraints checked at an authorized Mercedes-Benz Center after a rear-end collision. G Warning! When pushing back the head restraint cushion, make sure your fingers do not become caught between the head restraint cushion and the cover. Failing to do so may lead to injury.

! Be careful not to damage upholstery.

i For your convenience, we recommend that you have this work carried out at an authorized Mercedes-Benz Center.

X Take reset tool : out of the Mercedes-

Benz literature pouch.

X Guide reset tool : into rectangular opening = between head restraint cushion ; and head restraint cover.

X Press reset tool : downward in direction of arrow until you hear the head restraint release mechanism audibly engage.

X Pull out reset tool :. X Firmly press the head restraint

cushion ; backward towards the head restraint cover in direction of arrow until it engages.

X Repeat this procedure for the second front

seat.

X After resetting the NECK-PRO active front head restraints store reset tool : in the Mercedes-Benz literature pouch.

For information on NECK-PRO active front head restraints, see “NECK-PRO active front head restraints” (Y page 50). For information on head restraint adjustment, see “Seats” (Y page 77).

Replacing SmartKey batteries

If the batteries in the SmartKey are discharged, the vehicle can no longer be locked or unlocked. It is recommended to have the batteries replaced at an authorized Mercedes-Benz Center.

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G Warning! Batteries contain poisonous and corrosive substances. Therefore, keep the batteries out of reach of children. If a battery is swallowed, seek medical help immediately. G Warning! SmartKey batteries contain perchlorate material, which may require special handling and regard for the environment. Check with your local government’s disposal guidelines. California residents, see www.dtsc.ca.gov/ HazardousWaste/Perchlorate/ index.cfm. Batteries contain materials that can harm the environment if disposed of improperly. Recycling of batteries is the preferred method of disposal. Many states (USA only) or provinces (Canada only) require sellers of batteries to accept old batteries for recycling. When inserting the batteries, make sure they are clean and free of lint. When replacing batteries, always replace both batteries. i The required replacement batteries are

available at any authorized Mercedes-Benz Center.

Replacement batteries: Lithium, type CR 2025 or equivalent. X Remove the mechanical key from the

SmartKey (Y page 261).

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265

SmartKey

X Press mechanical key ; into the SmartKey

opening until battery compartment cover : opens. Do not keep the cover shut.

X Remove the battery compartment cover. X Pat the SmartKey against the palm of your

hand until battery = falls out.

X Insert the new battery with the positive

terminal (+) facing up. Use a lint-free cloth. X Insert the tabs of the battery compartment cover into the housing and press the cover closed.

X Slide mechanical key : back into the

SmartKey.

X Check the operation of the SmartKey.

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266 Replacing bulbs

SmartKey with KEYLESS-GO

X Insert mechanical key : into opening. X Press mechanical key : in direction of

arrow. Battery compartment ; is unlatched. X Pull battery compartment ; out of the

SmartKey housing.

X Pull out batteries =. X Insert new batteries = under contact

springs ? with the positive terminal (+) side facing up.

X Return battery compartment ; into

SmartKey housing until it locks into place.

X Slide mechanical key : back into the

SmartKey.

X Check the operation of the SmartKey as

well as the KEYLESS-GO function.

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Replacing bulbs Safety notes Safe vehicle operation depends on proper exterior lighting and signaling to a large degree. Correct headlamp adjustment is extremely important. Have headlamps checked and readjusted at regular intervals and when a bulb has been replaced. Contact an authorized Mercedes-Benz Center for headlamp adjustment. G Warning! Bulbs and bulb sockets can be very hot. Allow the lamp to cool down before changing a bulb. Keep bulbs out of reach of children. Halogen lamps contain pressurized gas. A bulb can explode if you Rtouch or move it when hot Rdrop the bulb Rscratch the bulb Wear eye and hand protection. Because of high voltage in Xenon lamps, it is dangerous to replace the bulb or repair the lamp and its components. We recommend that you have such work done by a qualified technician. G Warning! The bulbs in the tail lamps cannot be replaced individually. The tail lamp bulbs are under pressure and could explode during an attempt to replace them. If the tail lamps are malfunctioning, have them replaced at an authorized Mercedes-Benz Center.

i Since replacing bulbs is a technically

highly demanding process, we recommend to have them replaced at an authorized Mercedes-Benz Center.

i If the headlamps or front fog lamps are fogged up on the inside as a result of high

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humidity, driving the vehicle a distance with the lights on should clear up the fogging.

Bulbs You can replace the following bulbs yourself: Halogen headlamps

Type : Turn signal lamp: 3457AK ; High-beam lamp: H7 55 W = Parking and standing lamp: W 5 W ? Low-beam lamp: H7 55 W

Bi-Xenon headlamps

Type : Turn signal lamp: 3457AK ; High-beam lamp: H7 55 W

License plate lamps

Type : License plate lamps: C 5 W

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268 Replacing bulbs

Notes on bulb replacement ! Do not replace LEDs or bulbs not described in this section. You could otherwise damage the LEDs, the bulbs or parts of the vehicle. Only have the LEDs and bulbs replaced at an authorized Mercedes- Benz Center. G Observe Safety notes, see page 266. ROnly use 12-volt bulbs of the same type and with the specified watt rating.

RSwitch the lights off before changing a bulb

to prevent short circuits.

RAlways use a clean lint-free cloth when

handling bulbs.

RYour hands should be dry and free of oil and

grease.

RIf the newly installed bulb does not come on, contact an authorized Mercedes-Benz Center.

i Mercedes-Benz recommends using

Longlife (LL) bulbs.

Replacing bulbs for front lamps G Warning! Do not remove the cover for the Bi-Xenon headlamp. Because of high voltage in Xenon lamps, it is dangerous to replace the bulb or repair the lamp and its components. It is recommended to have such work done by a qualified technician. Before you start to replace a bulb for a front lamp, do the following: X Switch off the ignition. X Turn the exterior lamp switch to position