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Display messages Front Passenger Airbag Enabled See Operator's Manual
Possible causes/consequences and M Solutions The front-passenger air bag is enabled during the journey, although: Rthere is a child, a small adult or an object weighing less than the
system's weight threshold on the front-passenger seat.
Rthe front-passenger seat is unoccupied. The system may detect the additional weight of objects on the seat or forces acting on the seat. 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 Open the front-passenger door. X Remove the child and the child restraint system from the front-
passenger seat.
X If necessary, secure the child in a child restraint system on a
suitable rear seat.
X Make sure that there are no objects adding to the weight applied
to the seat. The system may otherwise detect the additional weight 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 45(Y page 43) indicator lamps and the multifunction display and check the following: Seat unoccupied and ignition switched on: Rthe 45 indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Y page 43) has deactivated the front-passenger air bag. RThe Front Passenger Airbag Enabled See Operator's Manual or Front Passenger Airbag Disabled See Operator's Manual display messages must not appear. Wait for 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 45 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.
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G Warning If the 45 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.
Display messages Front Passenger Airbag Disabled See Operator's Manual
Possible causes/consequences and M Solutions The front-passenger air bag is deactivated 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 system may interpret the occupant's weight as lower than it actually is. 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 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 45(Y page 43) indicator lamps and the multifunction display and check the following: Seat unoccupied and ignition switched on: Rthe 45 indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Y page 43) has deactivated the front-passenger air bag. RThe Front Passenger Airbag Enabled See Operator's Manual or Front Passenger Airbag Disabled See Operator's Manual display messages must not appear. Wait for 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 45 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 45 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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Brakes Display messages $(USA only) J(Canada only) ABS and ESC Currently Unavailable See Operator's Manual
$(USA only) J(Canada only) ABS and ESC Inoperative See Operator's Manual
Possible causes/consequences and M Solutions G Risk of accident ABS (Anti-lock Braking System), ESP® (Electronic Stability Program), BAS (Brake Assist), PRE-SAFE®, HOLD and hill start assist are temporarily unavailable. The on-board voltage may be insufficient, for example. BAS PLUS (Brake Assist PLUS) and PRE- SAFE® Brake may be inoperative as well. In addition, the ä, å and ! warning lamps light up in the instrument cluster. ATTENTION ASSIST is 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.
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®, BAS, PRE-SAFE®, HOLD and hill start assist are unavailable due to a malfunction. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ä, å and ! warning lamps light up in the instrument cluster. ATTENTION ASSIST is 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.
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Display messages $(USA only) J(Canada only) EBD, ABS, and ESC Inoperative See Operator's Manual
Check Brake Pad Wear $(USA only) J(Canada only) Release Park. Brake $(USA only) J(Canada only) Check Brake Fluid Level
Possible causes/consequences and M Solutions G Risk of accident EBD (Electronic Brake force Distribution), ABS, ESP®, BAS, PRE- SAFE®, HOLD and hill start assist are unavailable due to a malfunction. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ä, å and ! warning lamps in the instrument cluster light up and a warning tone sounds. ATTENTION ASSIST is 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. Additionally, the red $ (USA only)/ J (Canada only) warning lamp lights up in the instrument cluster 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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Possible causes/consequences and M Solutions The left or right-hand cornering light is faulty. X Check whether you are permitted to change the bulb yourself
The left or right-hand low-beam headlamp 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
Lights i Display messages about LEDs:
or X Visit a qualified specialist workshop.
(Y page 124).
(Y page 124).
This display message will only appear if all LEDs have failed. Display messages Check Left Cornering Light orCheck Right Cornering Light Check Left Low Beam orCheck Right Low Beam Check Rear Left Turn Signal orCheck Rear Right Turn Signal Check Front Left Turn Signal orCheck Front Right Turn Signal Check Left Mirror Turn Signal orCheck Right Mirror Turn Signal
(Y page 124).
(Y page 124).
(Y page 124).
or X Visit a qualified specialist workshop.
or X Visit a qualified specialist workshop.
or X Visit a qualified specialist workshop.
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
The front left-hand or front right-hand turn signal is faulty. X Check whether you are permitted to change the bulb yourself
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Display messages Check Center Brake Lamp
Check Left Tail and Brake Lamps orCheck Right Tail and Brake Lamps Check Left High Beam orCheck Right High Beam Check Left License Plate Lamp orCheck Right License Plate Lamp Check Left Fog Lamp orCheck Front Fog Lamp Check Rear Left Fog Lamp orCheck Rear Right Fog Lamp
Possible causes/consequences and M Solutions The high-mounted brake lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop. The left or right brake/tail lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 124).
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 124).
or X Visit a qualified specialist workshop.
The left or right-hand license plate lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop. X Visit a qualified specialist workshop. The left-hand or right-hand front fog lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 124).
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 124).
or X Visit a qualified specialist workshop.
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Display messages Check Front Left Parking Lamp orCheck Front Right Parking Lamp Check Left Reverse Lamp orCheck Right Reverse Lamp Check Front Left Sidemarker Lamp orCheck Front Right Sidemarker Lamp Check Rear Left Sidemarker Lamp orCheck Rear Right Sidemarker Lamp Check Left Daytime Running Light orCheck Right Daytime Running Light Active Headlamps Inoperative
Possible causes/consequences and M Solutions The front left or front right standing lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 124).
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 124).
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 124).
or X Visit a qualified specialist workshop.
The rear left or right side marker lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 124).
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 124).
or X Visit a qualified specialist workshop.
The active light function is faulty. X Visit a qualified specialist workshop.
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Display messages Malfunction See Operator's Manual Auto Lamp Function Inoperative Switch Off Lights Adaptive Highbeam Assist Inoperative Adaptive Highbeam Assist Currently Unavailable See Operator's Manual
Possible causes/consequences and M Solutions The exterior lighting is faulty. X Visit a qualified specialist workshop.
The light sensor is faulty. 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 c.
Adaptive Highbeam Assist is faulty. X Visit a qualified specialist workshop.
Adaptive Highbeam Assist is deactivated and temporarily inoperative, if: Rthe windshield is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. X Clean the windshield. Adaptive Highbeam Assist is available again, if: Rthe dirt (e.g. slush) drops away while the vehicle is in motion. Rthe system detects that the camera is fully operational again. The Adaptive Highbeam Assist Now Available message is displayed.
Engine Display messages Check Coolant Level See Operator's Manual
Possible causes/consequences and M Solutions The coolant level is too low. X Add coolant, observing the warning notes when doing so
(Y page 311).
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.
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! 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. Display messages Coolant Level Low Stop Vehicle Turn Engine Off
Possible causes/consequences and M Solutions The coolant is too hot. X Pull over and stop the vehicle safely as soon as possible, paying
X Make sure that the air supply to the radiator is not blocked, e.g.
attention to road and traffic conditions.
by snow, slush or ice.
X Wait until the display message disappears before restarting the
engine. There is otherwise 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 as soon as possible, 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. There is otherwise 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 below 248 ‡ (120 †), continue driving
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 engine oil level has dropped to a critical level. A warning tone also sounds. X Check the oil level (Y page 309). X If necessary, add the engine oil (Y page 310). X Have the engine checked for leaks if engine oil has to be added
more often than usual.
Check Engine Oil At Next RefuelingCheck Engine Oil 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 dropped into the reserve range. X Refuel at the nearest gas station.
Fuel Level Low Gas Cap Loose
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.
Ultra Low-sulfur Diesel Fuel Only
¸ Replace Air Filter
Check 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 HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM).
Vehicles with a diesel engine: the engine air filter is dirty 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 167). 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 167). Visit a qualified specialist workshop.
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Driving systems Display messages À Attention Assist Drowsiness Detected
À Attention Assist Inoperative ¨ Vehicle Rising ¨ Vehicle Rising Please Wait
¨ Pull Over Car Too Low
Possible causes/consequences and M Solutions Based on specific criteria, ATTENTION ASSIST has determined tiredness or a decrease in attention. A warning tone also sounds.
X If necessary, take a break. During long journeys, take regular breaks in good time so you get enough rest. ATTENTION ASSIST has failed. X Visit a qualified specialist workshop.
Your vehicle is adjusting to the level you have selected.
The vehicle level is too low when the vehicle is stationary. A warning tone also sounds. X Do not pull away.
When the display message goes out, the vehicle level is set.
You have pulled away while the vehicle level is still too low. AIRMATIC sets the vehicle to the selected level after a short period. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Apply the parking brake. X Wait until the display message disappears before pulling away. G Risk of accident AIRMATIC is faulty. A warning tone also sounds. X Drive no faster than 50 mph (80 km/h). 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 Pull over and stop the vehicle safely, paying attention to road
and traffic conditions, and select a higher vehicle level. Depending on the malfunction, it may be possible to raise the vehicle.
X Visit a qualified specialist workshop.
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Display messages ¨ Malfunction
HOLD Off
Radar Sensors Deactivated See Operator's Manual
Lane Keeping Assist Currently Unavailable See Operator's Manual orActive Lane Keeping Assist Currently Unavailable See Operator's Manual
Lane Keeping Assist Inoperative orActive Lane Keeping Assist Inoperative
Possible causes/consequences and M Solutions G Risk of accident The AIRMATIC function is restricted. The vehicle's handling characteristics may be affected. X Drive no faster than 50 mph (80 km/h). X Visit a qualified specialist workshop. The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. X Reactivate the HOLD function later. A condition for activation is no longer met when the brake pedal is firmly depressed. A warning tone also sounds. X Check the activation conditions for the HOLD function
(Y page 188).
The radar sensor system is deactivated. X Check whether or not the radar sensor system may be activated
(Y page 232).
X Switch on the radar sensor system (Y page 232). Lane Keeping Assist or Active Lane Keeping Assist is deactivated and temporarily inoperative if: Rthe windshield is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. Rthere are no lane markings for a longer period. Rthe lane markings are worn, dark or covered, for example by dirt
or snow.
Lane Keeping Assist or Active Lane Keeping 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 camera is fully operational again. If the display message continues to be displayed: X Clean the windshield. Lane Keeping Assist or Active Lane Keeping Assist is faulty. X Visit a qualified specialist workshop.
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Display messages Blind Spot Assist Currently Unavailable See Operator's Manual orActive Blind Spot Assist Currently Unavailable See Operator's Manual
Blind Spot Assist Inoperative orActive Blind Spot Assist Inoperative Parking Guidance Inoperative
Possible causes/consequences and M Solutions Blind Spot Assist or Active 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.
The yellow 9 indicator lamps also light up in the exterior mirrors. Blind Spot Assist or Active 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 317). X Restart the engine. Blind Spot Assist or Active Blind Spot Assist is faulty. The yellow 9 indicator lamps also light up in the exterior mirrors. X Visit a qualified specialist workshop.
Parking Guidance is faulty. X Restart the engine. If the display message continues to be displayed: X Visit a qualified specialist workshop.
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Display messages Parking Guidance Canceled
Parking Guidance Finished DISTRONIC PLUS Off DISTRONIC PLUS Now Available
Possible causes/consequences and M Solutions Parking Guidance is deactivated, because: Rthe vehicle is skidding. Rthe sensors are dirty. Ra malfunction has occurred. A warning tone also sounds. X Reactivate Parking Guidance later. If the parking space symbol is not displayed in the multifunction display when you are driving at a speed of less than 19 mph (30 km/h): X Clean the sensors (Y page 317). X Restart the engine. If the parking space symbol is still not displayed in the multifunction display when you are driving at a speed of less than 19 mph (30 km/h): X Visit a qualified specialist workshop. Parking Guidance is deactivated because you have left the lane. X Park again and, while doing so, observe the display messages
in the multifunction display.
The vehicle is parked. A warning tone also sounds. The display message disappears automatically. DISTRONIC PLUS has been switched off. When it is deactivated automatically, a warning tone also sounds (Y page 186). DISTRONIC PLUS is operational again after being temporarily unavailable. You can now activate DISTRONIC PLUS again (Y page 179).
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Display messages DISTRONIC PLUS Currently Unavailable See Operator's Manual
Possible causes/consequences and M Solutions DISTRONIC PLUS is deactivated and is temporarily inoperative if:
Rthe DISTRONIC PLUS cover in the radiator grill is dirty. Rthe sensors in the bumpers are dirty. 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.
Rits function is impaired due to heavy rain or snow. Rthe system is outside the operating temperature range. Rthe on-board voltage is too low. A warning tone also sounds. DISTRONIC PLUS 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 system is within the operating temperature range. If the display message continues to be displayed: X Clean the DISTRONIC PLUS cover in the radiator grill
(Y page 317).
X Clean the bumpers (Y page 317). X Restart the engine.
DISTRONIC PLUS is faulty. BAS PLUS and PRE-SAFE® Brake may also have failed. A warning tone also sounds. X Visit a qualified specialist workshop. You have depressed the accelerator pedal. DISTRONIC PLUS is no longer controlling the speed of the vehicle. X Take your foot off the accelerator pedal. An activation condition for DISTRONIC PLUS is not fulfilled. X Check activation conditions for DISTRONIC PLUS
(Y page 179).
DISTRONIC PLUS Inoperative
DISTRONIC PLUS Override
DISTRONIC PLUS --- mph
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Display messages Cruise Control Inoperative
Cruise Control --- mph
Possible causes/consequences and M Solutions Cruise control is faulty. A warning tone also sounds. X Visit a qualified specialist workshop. A condition for activating cruise control has not been met. You attempted 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 177).
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. 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.
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Display messages Check Tire Pressure Soon G Risk of accident
Possible causes/consequences and M Solutions
The tire pressure loss warning system has detected a significant loss in pressure. A warning tone also sounds. 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 367).
tire pressure.
Check Tire Pressure Then Restart Run Flat Indicator
Run Flat Indicator Inoperative Tire pressures will be displayed after driving a few minutes Tire Press. Monitor Inoperative Tire Pressure Monitor Inoperative No Wheel Sensors
Check Tires
X Restart the tire pressure loss warning system when the tire
pressure is correct (Y page 355).
A display message from the tire pressure loss warning system was shown and the system has not been restarted since. X Set the correct tire pressure in all four tires. X Restart the tire pressure loss warning system (Y page 355). 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. 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 357). X If necessary, change a wheel (Y page 367).
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Display messages Caution Tire Malfunction G Risk of accident
Possible causes/consequences and M Solutions
Correct Tire Pressure
Tire Press. Sensor(s)Missing
Tire Press. Monitor Currently Unavailable
Tire Press. Warning Caution Tire Malfunction
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 a wheel (Y page 367). 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 357).
X Restart the tire pressure monitor (Y page 359). 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.
No signals are being received from the tire pressure sensors due to radio interference. 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 a wheel (Y page 367).
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Display messages Check Tire Pressure
Correct Tire Pressure
Vehicle Display messages Shift to 'P' or 'N' to Start Engine
Auxiliary Battery Malfunction
Apply Brake to Shift from P
Door Open Vehicle Not in P
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 a wheel (Y page 367). X Check the tire pressure. If necessary, correct the tire pressure
(Y page 357).
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 357).
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. The driver's door is open and the transmission is in position R, N or D. A warning tone also sounds. X Shift the transmission to position P. X Engage the parking brake.
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Display messages Service Required Do Not Shift Gears Visit Dealer
Possible causes/consequences and M Solutions You cannot change the transmission position due to a malfunction. A warning tone also sounds. If transmission position D is selected: X Drive to a qualified specialist workshop without shifting the
transmission from position D.
Only shift to P when Vehicle is Stationary
If transmission position R, N or P is selected: X Notify a qualified specialist workshop or breakdown service. 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.
N Sedan: the trunk lid is open.
X Close the trunk lid.
A Wagon: the tailgate is open.
X Close the tailgate. G Risk of accident The hood 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.
X Close all doors. G Risk of injury The backrest in the rear is not engaged on the left-hand and/or right-hand side. X Push the backrest back until it engages.
or
Rear Lt. Backrest Not Latched orRear Rt. Backrest Not Latched
C At least one door is open.
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Display messages Power Steering Malfunction See Operator's Manual
No Service
Possible causes/consequences and M Solutions G Risk of accident The power steering assistance is faulty. You will need to use more force to steer. A warning tone also sounds. 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.
¥ Check Washer Fluid
The washer fluid level in the washer fluid reservoir has dropped below the minimum. X Add washer fluid (Y page 312).
SmartKey Display messages Key Does Not Belong to Vehicle Take Your Key from Ignition Obtain a new key Replace Key Battery
Possible causes/consequences and M Solutions You have put the wrong SmartKey in the ignition lock. X Use the correct SmartKey.
The SmartKey is in the ignition lock. X Remove the SmartKey.
The SmartKey needs to be replaced. X Visit a qualified specialist workshop.
The batteries of the KEYLESS-GO key are discharged. X Change the batteries (Y page 80).
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Display messages Don't Forget Your Key
Key Not Detected (red display message)
Key Not Detected (white display message)
Key Detected in Vehicle
Possible causes/consequences and M Solutions The display message is displayed for a maximum of 60 seconds and is just a reminder. You have opened the driver's door with the engine switched off. The KEYLESS-GO key is not in the ignition lock. X Take the KEYLESS-GO key with you when leaving the vehicle. The KEYLESS-GO key is not in the vehicle. A warning tone also sounds. 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. A warning tone also sounds. 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 KEYLESS-GO key in the ignition
lock if necessary.
The KEYLESS-GO key cannot be detected at present. X Change the location of the key with the KEYLESS-GO functions
in the vehicle.
If the KEYLESS-GO key is still not detected: X Change the location of the key with the KEYLESS-GO functions
in the vehicle.
X Operate the vehicle with the KEYLESS-GO 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.
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Display messages Remove 'Start' Button and Insert Key
Close Doors to Lock Vehicle
Possible causes/consequences and M Solutions KEYLESS-GO is temporarily malfunctioning or is defective. A warning tone also sounds. X Insert the SmartKey into the ignition lock and turn it to the
desired position.
X Visit a qualified specialist workshop. At least one door is open. A warning tone also sounds. X Close all doors and lock the vehicle again.
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Warning and indicator lamps in the instrument cluster 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.
$ (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 The brake boosting effect is malfunctioning and the braking characteristics may be affected. 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 Observe the additional display messages in the multifunction
display. 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 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.
