2011 Mercedes-benz R Class Owners Manual

suitable rear seat.

X Make sure that no forces are acting on the seat, such as:

Rtrapped books, bags, etc. lying on, behind or beside the seat Rhead restraints pressing against the headliner The system may otherwise detect these forces and interpret the seat occupant's weight as greater than it actually is.

X Make sure that the seat is unoccupied and has no objects placed on it, close the front-passenger door, and switch on the ignition. Observe the 42 indicator lamps (Y page 42) and the multifunction display and check the following: Seat unoccupied and ignition switched on: Rthe 42 indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Y page 42) has disabled the front-passenger air bag. Rthe display messages Front Passenger Airbag Enabled See Operator's Manual or Front Passenger Airbag Disabled See Operator's Manual must not appear in the multifunction display. Wait for a period of at least 60 seconds until the necessary system checks have been completed and to make sure that the display messages do not appear in the multifunction display.

If these conditions are met, the front-passenger seat can be occupied again. Whether the 42 indicator lamp remains lit or goes out depends on how OCS classifies the occupant. If the conditions are not met, the system is not operating correctly.

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Display messages

Possible causes/consequences and M Solutions X Visit a qualified specialist workshop immediately.

G Warning If the 42 indicator lamp remains off even after performing the above corrective steps, do not have any children 12 years old and under and other small individuals use the front- passenger seat until the system has been repaired.

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Display messages Front Passenger Airbag Disabled See Operator's Manual

Possible causes/consequences and M Solutions The front-passenger air bag is disabled during the journey even though an adult or a person larger than a certain size is occupying the front-passenger seat. If additional forces are applied to the seat, the weight the system detects may be too low. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Engage the parking brake. X Switch off the ignition. X Have the occupant get out of the vehicle. X Set the seat higher (Y page 100). X Make sure that no objects are exerting force on the seat, e.g. books, bags, etc. lying under, behind or beside the seat. These forces may otherwise cause the system to detect too low a weight and interpret the seat occupant's weight as less than it actually is.

X Make sure that the seat is unoccupied and has no objects placed on it, close the front-passenger door, and switch on the ignition. Observe the 42(Y page 42) indicator lamps and the multifunction display and check the following: Seat unoccupied and ignition switched on: Rthe 42 indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Y page 42) has disabled the front-passenger air bag. Rthe display messages Front Passenger Airbag Enabled See Operator's Manual or Front Passenger Airbag Disabled See Operator's Manual cannot appear in the multifunction display. Wait for a period of at least 60 seconds until the necessary system checks have been completed and to make sure that the display messages do not appear in the multifunction display.

If these conditions are met, the front-passenger seat can be occupied again. Whether the 42 indicator lamp remains lit or goes out depends on how OCS classifies the occupant. If the conditions are not met, the system is not operating correctly. X Visit a qualified specialist workshop immediately.

G Warning If the 42 indicator lamp remains lit 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.

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Apply the brakes. Display messages ABS ABS, ESP Unavailable See Operator's Manual

ABS ABS, ESP Inoperative See Operator's Manual

Possible causes/consequences and M Solutions G Risk of accident ABS (Anti-lock Brake System) and ESP® (Electronic Stability Program) and therefore also PRE-SAFE® are temporarily unavailable. The self-diagnosis function might not be complete, for example. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Carefully drive a short distance making slight steering

movements at a speed above 12 mph (20 km/h) If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop. G Risk of accident ABS, ESP® and therefore also PRE-SAFE® are not available due to undervoltage. BAS has also been deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Drive on carefully. X Visit a qualified specialist workshop immediately. G Risk of accident ABS, ESP® and therefore also PRE-SAFE® are not available due to a malfunction. BAS has also been deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Drive on carefully. X Visit a qualified specialist workshop immediately.

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Display messages (USA only) (Canada only) EBV, ABS, ESP Inoperative See Operator's Manual

Brake Wear (USA only) (Canada only) Release Parking Brake (USA only) (Canada only) Check Brake Fluid Level

Possible causes/consequences and M Solutions G Risk of accident EBD (Electronic Brake-force Distribution), ABS (Anti-lock Brake System), ESP® (Electronic Stability Program) and therefore also PRE-SAFE® are not available due to a malfunction. BAS (Brake Assist) is also deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Drive on carefully. X Visit a qualified specialist workshop immediately. The brake pads/linings have reached their wear limit. X Visit a qualified specialist workshop.

You are driving with the parking brake engaged. A warning tone also sounds. X Release the parking brake.

G Risk of accident There is insufficient brake fluid in the brake fluid reservoir. In addition, the red warning lamp $(USA only) or J (Canada only) in the instrument cluster lights up and a warning tone sounds. X Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances. X Engage the parking brake. X Consult a qualified specialist workshop. X Do not add brake fluid. This will not rectify the malfunction.

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

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Lights i Display messages about LEDs:

This display message will only appear if all LEDs have failed. Display messages Low Beam Left orLow Beam Right

Possible causes/consequences and M Solutions The left or right-hand low-beam headlamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The left or right-hand trailer tail light is faulty. X Check whether you are permitted to change the bulb yourself. or X Visit a qualified specialist workshop.

Trailer Tail Lamp Left orTrailer Tail Lamp Right Trailer Turn Signal Left orTrailer Turn Signal Right Trailer Brake Lamp

Turn Signal Rear Left orTurn Signal Rear Right Turn Signal Front Left orTurn Signal Front Right

The left or right-hand trailer turn signal lamp is faulty. X Check whether you are permitted to change the bulb yourself. or X Visit a qualified specialist workshop.

The trailer brake lamp is faulty. X Check whether you are permitted to change the bulb yourself. or X Visit a qualified specialist workshop. The rear left-hand or rear right-hand turn signal is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop.

The front left-hand or front right-hand turn signal is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop.

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Display messages Turn Signal Left Mirror orTurn Signal Right Mirror 3rd Brake Lamp

Brake Lamp Left orBrake Lamp Right

Tail Lamp Left orTail Lamp Right

High Beam Left orHigh Beam Right

License Plate Lamp Left orLicense Plate Lamp Right

Possible causes/consequences and M Solutions The turn signal in the left-hand and/or right-hand exterior mirror is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The high-mounted brake lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The left or right-hand brake lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The left or right-hand tail lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The left or right-hand high beam is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The left or right-hand license plate lamp is faulty. The left or right-hand license plate lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop.

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Display messages Front Foglamp Left orFront Foglamp Right

Foglamp Rear Left orFoglamp Rear Right

Parking Lamp Front Left orParking Lamp Front Right Reverse Lamp Left orReverse Lamp Right

Marker Lamp Front Left orMarker Lamp Front Right Daytime Running Light Left orDaytime Running Light Right

Possible causes/consequences and M Solutions The left-hand or right-hand front fog lamp is faulty. The left-hand or right-hand front fog lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The left-hand or right-hand rear fog lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The front left or front right standing lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop.

The left or right-hand backup lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop. The front left or right side marker lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop.

The left or right-hand daytime running light is defective. X Check whether you are permitted to change the bulb yourself

(Y page 121).

or X Visit a qualified specialist workshop.

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Display messages AUTO Light Inoperative

Possible causes/consequences and M Solutions The light sensor is faulty. The low-beam headlamps are switched on. X USA only: switch off daytime driving lights in the on-board

computer (Y page 206).

Switch Off Lights

Engine Display messages Top Up Coolant See Operator's Manual

X Switch the lights on and off using the light switch. X Visit a qualified specialist workshop. The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to $ or c. or X If the rear fog lamp is switched on: press the light switch in to

the stop.

Possible causes/consequences and M Solutions The coolant level is too low. X Add coolant, observing the warning notes before doing so

(Y page 281).

X If coolant needs adding more often than usual, have the engine

coolant system checked at a qualified specialist workshop.

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.

! The coolant level is too low. Avoid making long journeys with too little coolant in the cooling

system. The engine will otherwise be damaged. The display messages and the corresponding symbol that indicate that the coolant level is too low must not be ignored.

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Display messages Coolant Stop car, switch engine off

Possible causes/consequences and M Solutions The coolant is too hot. X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Make sure that the air supply to the radiator is not blocked, e.g.

by snow, slush or ice.

X Wait until the display message disappears before restarting the

engine. Otherwise, there is a risk of engine damage.

X Pay attention to the coolant temperature display. X If the temperature increases again, visit a qualified specialist

workshop immediately.

The poly-V-belt may have torn. X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Open the hood. X Check whether the poly-V-belt is torn. If the poly-V-belt is torn: ! Do not continue driving. The engine could otherwise overheat. X Consult a qualified specialist workshop. If the poly-V-belt is OK: X Wait until the display message disappears before restarting the

engine. Otherwise, there is a risk of engine damage.

X Pay attention to the coolant temperature display. X Visit a qualified specialist workshop.

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.

! If the coolant temperature exceeds 248 ‡(120 †) do not continue driving. The engine will

otherwise be damaged.

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Display messages ? The engine fan is faulty.

Possible causes/consequences and M Solutions

X At coolant temperatures under 248 ‡(120 †), drive to the next

qualified specialist workshop.

X Avoid subjecting the engine to heavy loads, e.g. driving in

mountainous terrain, and stop-start driving.

# The battery is not being charged.

Possible causes are: Ra faulty alternator Ra torn poly-V-belt Ra malfunction in the electronics X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Open the hood. X Check whether the poly-V-belt is torn. If the poly-V-belt is torn: ! Do not continue driving. The engine could otherwise overheat. X Consult a qualified specialist workshop. If the poly-V-belt is OK: X Visit a qualified specialist workshop. The battery is faulty. X Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances. X Engage the parking brake. X Consult a qualified specialist workshop. The oil level is too low. X Check the oil level (Y page 279). X If necessary, add the engine oil (Y page 280). X Have the engine checked for leaks if engine oil has to be added

more often than usual.

Battery/ Alternator Stop Vehicle

Check engine oil level at next refueling

Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http://www.mbusa.com (USA only). ! The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of

engine damage. The display messages and the corresponding symbol that indicate that the oil level is too low must not be ignored.

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Display messages Possible causes/consequences and M Solutions C There is only a small amount of fuel in the fuel tank.

X Refuel at the nearest gas station. The fuel level has fallen below the reserve range. The fuel tank must be filled up to at least the reserve fuel level; otherwise, engine running may be impaired. X Refuel at the nearest gas station. The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking. X Check that the fuel filler cap is correctly closed. X If the fuel filler cap is not correctly closed: close the fuel filler

X If the fuel filler cap is closed: visit a qualified specialist

cap.

workshop.

Reserve Fuel

Gas Cap Open

Ultra Low-sulfur Diesel Fuel Only

¸ Replace air filter

· Clean Fuel Filter

Ø Check Additive See Operator's Manual

Ø Remaining Starts: 20

Vehicles with a diesel engine: the fuel level has fallen below the reserve range. X Check that the fuel filler cap is correctly closed. X Refuel at the nearest gas station. X Only use commercially available vehicular ULTRA-LOW SULFUR

DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM).

Vehicles with a diesel engine: the engine air filter is contaminated and must be replaced. X Visit a qualified specialist workshop. Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off. X Visit a qualified specialist workshop.

The AdBlue® tank is empty. X Have the AdBlue® tank filled as soon as possible at a qualified

specialist workshop (Y page 165). Visit a qualified specialist workshop.

The AdBlue® level has fallen to a minimum. X Have the AdBlue® tank filled as soon as possible at a qualified

specialist workshop (Y page 165). Visit a qualified specialist workshop.

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Driving systems Display messages ° Vehicle Rising Wait Briefly

° STOP Car Too Low

° Level Selection Not Permitted

° Compressor Cooling Down

° Malfunction

Possible causes/consequences and M Solutions The vehicle level is too low. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Wait until the display message disappears before pulling away. G Risk of accident You have pulled away while the vehicle level is still too low or AIRMATIC is faulty. AIRMATIC sets the vehicle to the selected level after a short period. While the display message is displayed: X Make only slight steering movements. The front fender or the tires could otherwise be damaged when the steering movement is too large.

X Listen for scraping sounds. X Do not drive faster than 50 mph (80 km/h). If the display message continues to be displayed: X Have the vehicle checked at a qualified specialist workshop. You cannot change the vehicle level because you are exceeding the permissible speed for the selected vehicle level. X Drive more slowly and then select the desired vehicle level again

(Y page 183).

You have selected a higher vehicle level. The compressor first needs to cool down because of frequent level changes. X Drive in a manner appropriate for the current vehicle level. X Make sure that there is sufficient ground clearance. X Allow the compressor to cool down.

When the compressor has cooled down, the display message disappears. The vehicle then continues rising to the selected level.

AIRMATIC is faulty. X Do not drive faster than 50 mph(80 km/h). X Make sure that there is sufficient ground clearance. X Have the vehicle checked at a qualified specialist workshop.

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Display messages Blind Spot Assist Currently Unavailable See Operator's Manual

Blind Spot Assist Inoperative

Cruise Control Inoperative Cruise Control --- mph

DISTRONIC --- MPH

Possible causes/consequences and M Solutions Blind Spot Assist is temporarily inoperative if: Rthe sensors are dirty. Rits function is impaired due to heavy rain or snow. Rthe radar sensor system is outside the operating temperature

range.

Rthe radar sensor system is temporarily inoperative, e.g. due to

electromagnetic radiation emitted by nearby TV or radio stations or other sources of electromagnetic radiation.

Rthe on-board voltage is too low. The yellow 9 indicator lamps also light up in the exterior mirrors. Blind Spot Assist is operational again and the display message disappears when: Rthe dirt (e.g. slush) drops away while the vehicle is in motion. Rthe system detects that the sensors are fully available again. Rthe radar sensor system is back within the operating

temperature range.

If the display message continues to be displayed: X Clean the sensors (Y page 287). X Restart the engine. Blind Spot Assist is faulty. The yellow 9 indicator lamps also light up in the exterior mirrors. X Visit a qualified specialist workshop. Cruise control is faulty. X Visit a qualified specialist workshop. A condition for activating cruise control has not been met. You wanted to save a speed of less than 20 mph (30 km/h). X If the situation allows, drive faster than 20 mph (30 km/h) and

save the speed.

X Check the activation conditions for cruise control

(Y page 173).

An activation condition for DISTRONIC is not fulfilled. X If the situation allows, drive faster than 20 mph (30 km/h) and

save the speed.

X Check activation conditions for DISTRONIC (Y page 175).

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Display messages DISTRONIC Override DISTRONIC Inoperative DISTRONIC Currently Unavailable See Operator's Manual

Possible causes/consequences and M Solutions DISTRONIC is no longer controlling the speed of the vehicle. X Take your foot off the accelerator pedal. DISTRONIC is faulty or the display has failed. X Visit a qualified specialist workshop. DISTRONIC is deactivated and is temporarily inoperative if: Rthe DISTRONIC cover in the radiator grill is dirty. Rits function is impaired due to heavy rain, snow or fog. Rthe radar sensor system is temporarily inoperative, e.g. due to

electromagnetic radiation emitted by nearby TV or radio stations or other sources of electromagnetic radiation.

Rthe radar sensor system has not detected any vehicles or

stationary objects, e.g. traffic signs, for a long time.

Rthe system is outside the operating temperature range. DISTRONIC becomes available again and the display message disappears when: Rthe dirt (e.g. slush) drops away while the vehicle is in motion. Rthe system detects that the sensors are fully available again. Rthe system is within the operating temperature range. If the display message continues to be displayed: X Clean the DISTRONIC cover in the radiator grill (Y page 287). X Restart the engine.

G Warning DISTRONIC cannot take weather conditions into account. Switch off DISTRONIC or do not turn it on if the sensor is dirty or visibility is diminished as a result of snow, rain or fog. The distance control may be impaired even before the system is able to detect a dirty sensor. The DISTRONIC Currently Unavailable See Operator’s Manual message will be displayed in the multifunction display and DISTRONIC will be turned off.

Tires 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.

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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.

Display messages Tire Pressure Check Tires

Possible causes/consequences and M Solutions G Risk of accident The tire pressure loss warning system has detected a significant loss in pressure. X Stop the vehicle without making any sudden steering or braking maneuvers. Pay attention to the traffic conditions as you do so.

X Check the tires and, if necessary, change the wheel

X Check the tire pressures and, if necessary, set to the correct

(Y page 336).

tire pressure.

Check tires, then restart Run Flat Indicator

Run Flat Indicator Inoperative Tire pressure displayed after driving for a few minutes Tire Pressure Monitor Inoperative Tire Pressure Monitor Inoperative No Wheel Sensors

X Restart the tire pressure loss warning system when the tire

pressure is correct (Y page 325).

A display message for the tire pressure loss warning system was shown. X Set the correct tire pressure in all four tires. X Restart the tire pressure loss warning system (Y page 325). The tire pressure loss warning system is faulty. X Visit a qualified specialist workshop. The tire pressure monitor is measuring the tire pressure. X Drive on.

The tire pressures appear in the multifunction display after you have been driving for a few minutes.

The TPMS is faulty. X Visit a qualified specialist workshop.

The wheels mounted do not have a suitable tire pressure sensor. The tire pressure monitor is deactivated. X Mount wheels with suitable tire pressure sensors.

The TPMS is activated automatically after driving for a few minutes.

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Display messages Check Tire(s)

Caution: Tire Defect

Tire pressure(s) Please Correct

Tire Pressure Monitor Wheel Sensor Missing

Tire Pressure Monitor Currently Unavailable

Tire Pressure Caution: Tire Defect

Possible causes/consequences and M Solutions G Risk of accident The tire pressure in one or more tires has dropped significantly. The wheel position is displayed in the multifunction display. X Stop the vehicle without making any sudden steering or braking maneuvers. Pay attention to the traffic conditions as you do so.

X Correct the tire pressure (Y page 327). X If necessary, change the wheel (Y page 336). G Risk of accident The tire pressure in one or more tires has dropped suddenly. The wheel position is displayed in the multifunction display. X Stop the vehicle without making any sudden steering or braking maneuvers. Pay attention to the traffic conditions as you do so.

X If necessary, change the wheel (Y page 336). The tire pressure is insufficient in at least one of the tires or the tire pressure difference between the wheels is too great. The wheel position is displayed in the multifunction display. X Check the tire pressures at the next opportunity. If necessary,

correct the tire pressure (Y page 327).

X Restart the tire pressure monitor (Y page 329). There is no signal from the tire pressure sensor of one or several wheels. The pressure of the affected tire is not displayed in the multifunction display. X Have the faulty tire pressure sensor replaced at a qualified

specialist workshop.

Due to a source of radio interference no signals can be received from the wheel sensors. The tire pressure monitor is temporarily malfunctioning. X Drive on.

The TPMS restarts automatically as soon as the problem has been solved. G Risk of accident The tire pressure in one or more tires has dropped suddenly. X Stop the vehicle without making any sudden steering or braking maneuvers. Pay attention to the traffic conditions as you do so.

X If necessary, change the wheel (Y page 336).

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Display messages Tire Pressure Check Tires

Possible causes/consequences and M Solutions G Risk of accident The tire pressure in one or more tires has dropped significantly. X Stop the vehicle without making any sudden steering or braking maneuvers. Pay attention to the traffic conditions as you do so.

X If necessary, change the wheel (Y page 336). X Check the tire pressure. If necessary, correct the tire pressure

(Y page 327).

Please correct the tire pressures

The tire pressure is insufficient in at least one of the tires or the tire pressure difference between the wheels is too great. X Check the tire pressures at the next opportunity. If necessary,

correct the tire pressure (Y page 327).

Vehicle Display messages Shift to P or N to start engine

Auxiliary Battery Malfunction

Depress brake to shift out of P

Drive to workshop without shifting gears

Possible causes/consequences and M Solutions You have attempted to start the engine with the transmission in position R or D. X Shift the transmission to position P or N. The auxiliary battery for the automatic transmission is no longer being charged. X Visit a qualified specialist workshop. You have attempted to move the transmission selector lever to position D, R or N without depressing the brake pedal. X Depress the brake pedal.

or D. X Shift the transmission to position P. X Engage the parking brake. You cannot change the transmission position due to a malfunction. If transmission position D is selected: X Drive to a qualified specialist workshop without shifting the

transmission from position D.

If transmission position R, N or P is selected: X Notify a qualified specialist workshop or breakdown service.

Door Open Vehicle Not In Park The driver's door is open and the transmission is in position R, N

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Display messages Only shift to P when vehicle is at a standstill

Possible causes/consequences and M Solutions The vehicle is moving. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Shift the transmission to position P. G Risk of accident The hood or the tailgate is open. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Engage the parking brake. X Close the hood or tailgate. You have attempted to lock the vehicle with KEYLESS-GO while the tailgate or door is open. X Close all doors and/or the tailgate.

; At least one door is open.

Power Steering Malfunction See Operator's Manual

No Service

Bluetooth Ready

X Close all doors. G Risk of accident The power steering assistance is faulty. You will need to use more force to steer. X Check whether you are able to apply the extra force required. X If you are able to steer safely: carefully drive on to a qualified

specialist workshop.

X If you are unable to steer safely: do not drive on. Contact the

nearest qualified specialist workshop.

Your vehicle is outside the network provider transmitter/receiver range. X Wait until the mobile phone operational readiness symbol

appears in the multifunction display.

The Bluetooth® connection between your mobile phone and COMAND is not activated. X If desired, activate the Bluetooth® connection between the

mobile phone and COMAND (see the separate operating instructions).

¥ Top Up Washer Fluid

The washer fluid level has dropped to approximately ⅓ of the total reservoir capacity. X Add washer fluid (Y page 281).

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SmartKey Display messages Please replace key Remove key Don't Forget Your Key

Key Does Not Belong To Vehicle Change Key Batteries Key Not Detected (red display message)

Possible causes/consequences and M Solutions The SmartKey needs to be replaced. X Visit a qualified specialist workshop.

The SmartKey is in the ignition lock. X Remove the SmartKey.

The display message is shown for a maximum of 60 seconds and is only a reminder. You are opening the driver's door with the engine switched off. The SmartKey is not in the ignition lock. X Take the SmartKey with you when you leave the vehicle. You have put the wrong key in the ignition lock. X Use the correct key.

The batteries of the KEYLESS-GO key are discharged. X Change the batteries (Y page 77).

The KEYLESS-GO key is not in the vehicle. If the engine is switched off, you can no longer lock the vehicle centrally or start the engine. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Engage the parking brake. X Locate the KEYLESS-GO key. The KEYLESS-GO key is not detected while the engine is running because there is interference from a strong source of radio waves. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Engage the parking brake. X Operate the vehicle with the SmartKey in the ignition lock if

necessary.

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Display messages Key Not Detected (white display message)

Key Detected In Vehicle Pull starting button out then insert key

Possible causes/consequences and M Solutions The KEYLESS-GO key cannot be detected at present. X Change the location of the SmartKey with the KEYLESS-GO

functions in the vehicle.

If the KEYLESS-GO key is still not detected: X Change the location of the SmartKey with the KEYLESS-GO

functions in the vehicle.

X Operate the vehicle with the key in the ignition lock if necessary. The KEYLESS-GO key has been detected inside the vehicle during locking. X Remove the KEYLESS-GO key from the vehicle.

The KEYLESS-GO key can continuously not be detected. X Insert the SmartKey into the ignition lock and turn it to the

desired position.

X Visit a qualified specialist workshop.

Warning and indicator lamps in the instrument cluster Apply the brakes. Problem $ (USA only) J (Canada only) The red brake system warning lamp comes on while the vehicle is moving. A warning tone also sounds.

Possible causes/consequences and M Solutions You are driving with the parking brake engaged. X Release the parking brake.

The warning lamp goes out and the warning tone ceases.

$ (USA only) J (Canada only) The red brake system warning lamp comes on while the engine is running. A warning tone also sounds.

G Risk of accident There is insufficient brake fluid in the fluid reservoir. X Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances. X Engage the parking brake. X Consult a qualified specialist workshop immediately. X Observe the additional display messages in the multifunction

display.

Do not add brake fluid. This will not rectify the malfunction.

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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.

Seat belt Problem

After starting the engine, the red seat belt warning lamp lights up for 6 seconds.

After starting the engine, the red seat belt warning lamp lights up. In addition, a warning tone sounds for up to 6 seconds.

The red seat belt warning lamp lights up after the engine starts, as soon as the driver's or the front-passenger door is closed.

Possible causes/consequences and M Solutions The seat belt warning lamp reminds the driver and front passenger to fasten their seat belts. X Fasten your seat belt (Y page 54).

G Risk of injury The driver's seat belt is not fastened. X Fasten your seat belt (Y page 54).

The warning tone ceases.

G Risk of injury The driver or front passenger has not fastened their seat belt. X Fasten your seat belt (Y page 54).

The warning lamp goes out. G Risk of injury There are objects on the front-passenger seat. X Remove the objects from the front-passenger seat and stow

them in a secure place. The warning lamp goes out.

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Problem

The red seat belt warning lamp flashes and an intermittent audible warning sounds.

Possible causes/consequences and M Solutions G Risk of injury The driver or front passenger has not fastened their seat belt. In addition, you are driving faster than 15 mph (25 km/h) or you have briefly driven faster than 15 mph (25 km/h). X Fasten your seat belt (Y page 54).

The warning lamp goes out and the intermittent audible warning ceases. G Risk of injury There are objects on the front-passenger seat. In addition, you are driving faster than 15 mph (25 km/h) or you have briefly driven faster than 15 mph (25 km/h). X Remove the objects from the front-passenger seat and stow

them in a secure place. The warning lamp goes out and the intermittent audible warning ceases.

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Safety systems Problem

The yellow ABS warning lamp is lit while the engine is running.

The yellow ABS warning lamp is lit while the engine is running.

The yellow ABS warning lamp is lit while the engine is running.

Possible causes/consequences and M Solutions G Risk of accident ABS (Anti-lock Brake System) is deactivated due to a malfunction. Therefore, BAS (Brake Assist), ESP® (Electronic Stability Program), EBD (Electronic Brake-force Distribution) and PRE-SAFE® are also deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Observe the additional display messages in the multifunction

display.

X Drive on carefully. X Visit a qualified specialist workshop. If the ABS control unit is faulty, there is also a possibility that other systems, such as the navigation system or the automatic transmission, will not be available. G Risk of accident The on-board voltage is too low. ABS has been deactivated due to undervoltage. Therefore, ESP®, BAS and PRE-SAFE® are also deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Switch off consumers that are not required, e.g. the rear window

defroster or interior lighting. ABS will be available again as soon as the vehicle's on-board electrical system voltage increases.

If the warning lamp is still on: X Have the battery and alternator checked at a qualified specialist

workshop.

Self diagnosis is not yet complete. X Carefully drive a suitable distance making slight steering

movements at a speed above 12 mph (20 km/h).

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Problem $ (USA only) J (Canada only) !d The red brake warning lamp, the yellow ESP® and ESP® OFF warning lamps and the yellow ABS warning lamp are lit while the engine is running. A warning tone also sounds.

The yellow ESP® warning lamp flashes while the vehicle is in motion.

The yellow ESP® warning lamp flashes while the vehicle is in motion.

Possible causes/consequences and M Solutions G Risk of accident EBD is faulty. Therefore, ABS, BAS, PRE-SAFE®, hill start assist and ESP® trailer stabilization are also not available due to a malfunction. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Observe the additional display messages in the multifunction

display.

X Drive on carefully. X Visit a qualified specialist workshop. G Risk of accident ESP® or traction control has intervened because there is a risk of skidding or at least one wheel has started to spin. Cruise control or DISTRONIC is deactivated. X Only depress the accelerator pedal as far down as necessary

when pulling away.

X Release the accelerator pedal while the vehicle is in motion. X Adapt your driving style to suit the road and weather conditions. X Do not deactivate ESP®. Exceptions: (Y page 68).

At least one wheel is spinning and ETS (Electronic Traction System) is deactivated to prevent the brakes on the drive wheels from overheating. X Observe the additional display messages in the multifunction

display.

ETS switches back on again as soon as the brakes have cooled down. The display message disappears and the d warning lamp goes out.

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