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AUTO lights inoper‐ ative Switch off lights
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 Ã.
Lights (12-button multifunction steering wheel) i Display messages about LEDs:
This display message will only appear if all the LEDs have failed. Display messages Left cornering light or Right cor‐ nering light
Possible causes/consequences and M Solutions The left or right-hand cornering light is faulty. X Check whether you are permitted to replace the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop.
Left dipped beam or Right dipped beam
Trailer left tail lamp or Trailer right tail lamp Trailer left turn signal or Trailer right turn signal
The left or right-hand dipped-beam headlamp is faulty. X Check whether you are permitted to replace the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop.
The left or right-hand trailer tail lamp is faulty. X Observe the separate operating instructions provided by the
trailer manufacturer.
The left or right-hand trailer turn signal lamp is faulty. X Observe the separate operating instructions provided by the
trailer manufacturer.
Display messages Trailer brake lamp
Rear left turn sig‐ nal or Rear right turn signal
Front left turn signal or Front right turn signal
Left mirror turn signal or Right mirror turn signal Third brake lamp Left-hand tail lamp/brake lamp or Right-hand tail lamp/brake lamp Left main beamorRight main beam
Licence plate lamp, leftorLicence plate lamp, right
Display messages
273
Possible causes/consequences and M Solutions The trailer brake lamp is faulty. X Observe the separate operating instructions provided by the
trailer manufacturer.
The rear left-hand or rear right-hand turn signal is faulty. X Check whether you are permitted to replace the bulb yourself
(Y page 124).
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 replace the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop. The turn signal in the left-hand or right-hand exterior mirror is faulty. X Visit a qualified specialist workshop.
The third brake lamp is faulty. X Visit a qualified specialist workshop.
The left or right-hand tail lamp/brake lamp is faulty. X Visit a qualified specialist workshop.
The left or right-hand main-beam headlamp is faulty. X Check whether you are permitted to replace the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop.
The left or right-hand licence plate lamp is faulty. X Visit a qualified specialist workshop.
274 Display messages
Display messages Left fog lamporRight fog lamp Rear fog lamp Front left parking lamp or Front right parking lamp
Left revers. lamp or Right revers. lamp
Left daytime driv‐ ing lamporRight daytime driving lamp Intell. Light Sys‐ tem inoperative Malfunction See Owner's Manual
Possible causes/consequences and M Solutions The left-hand or right-hand front foglamp is faulty. X Visit a qualified specialist workshop.
The rear foglamp is faulty. X Visit a qualified specialist workshop.
The front left or front right parking lamp is faulty. X Check whether you are permitted to replace the bulb yourself
(Y page 124).
or X Visit a qualified specialist workshop.
The left or right-hand reversing lamp is faulty. X Check whether you are permitted to replace the bulb yourself
(Y page 125).
or X Visit a qualified specialist workshop.
The left-hand or right-hand daytime driving lamp is faulty. X Visit a qualified specialist workshop.
The Intelligent Light System is faulty. The lights remain available without the Intelligent Light System. X Visit a qualified specialist workshop.
The exterior lighting is faulty. X Visit a qualified specialist workshop. Vehicles with trailer tow hitch: a fuse may have blown. X Check the fuses (Y page 354). X If necessary, replace the blown fuse. Observe the warning notes
as you do so.
If the display message continues to be displayed: X Visit a qualified specialist workshop.
Display messages
275
Display messages AUTO lights inoper‐ ative Switch off lights Adaptive Highbeam Assist inoperative Adaptive Highbeam Assist currently unavailable See Owner's Manual
Possible causes/consequences and M Solutions 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 Ã.
Adaptive Highbeam Assist is faulty. X Visit a qualified specialist workshop.
Adaptive Highbeam Assist is deactivated and temporarily inoper- ative. Possible causes: Rthe windscreen is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. X Clean the windscreen. If the system detects that the camera is fully operational again, the Adaptive Highbeam Assist available again message is displayed. Adaptive Highbeam Assist is operational again.
Engine (4-button multifunction steering wheel) Display messages Coolant washer fluid
Possible causes/consequences and M Solutions The coolant level is too low. X Top up the coolant, observing the warning notes before doing
so (Y page 331).
X If the coolant needs topping up more often than usual, have the engine coolant system checked at a qualified specialist work- shop.
? The fan motor is faulty.
X If the coolant temperature is below 120 † you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic.
276 Display messages
Display messages Stop vehicle Sw. eng. Off
Possible causes/consequences and M Solutions The coolant is too hot. A warning tone also sounds. G WARNING Never drive with an overheated engine. Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. Steam from an overheated engine can cause serious burns, which can occur just by opening the bonnet. There is a risk of injury. X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 174). X Wait until the engine has cooled down. X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Do not start the engine again until the display message goes out and the coolant temperature is below 120 †. The engine may otherwise be damaged.
X Pay attention to the coolant temperature display. X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant level, the coolant temperature may rise to 120 †.
# The battery is not being charged.
A warning tone also sounds. Possible causes: Rfaulty alternator Rtorn poly-V-belt Ra malfunction in the electronics X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Open the bonnet. 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.
Display messages
277
Display messages Checking the engine oil level
Possible causes/consequences and M Solutions The engine oil level has dropped to the minimum level. A warning tone also sounds. X Check the oil level when next refuelling, at the latest
(Y page 329).
X If necessary, top up the engine oil (Y page 330). X Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual.
Reserve fuel level
The fuel level has dropped into the reserve range. Operation of the auxiliary heating is deactivated if the fuel level drops into the reserve range. X Refuel at the nearest filling station. C There is very little fuel in the fuel tank.
¸ Replace air cleaner
Clean the fuel fil‐ ter Top up AdBlue -Workshop-
Top up AdBlue No start: ..km
Top up AdBlue Engine start not poss. Check AdBlue
The auxiliary heating cannot be operated. X Refuel at the nearest filling station without fail. 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® level has fallen below the reserve range. A warning tone also sounds. X Have AdBlue® refilled as soon as possible at a qualified spe-
cialist workshop.
The AdBlue® level is only sufficient for the indicated distance. A warning tone also sounds. X Have AdBlue® refilled as soon as possible at a qualified spe-
cialist workshop.
The AdBlue® tank is empty. A warning tone also sounds. You can no longer start the engine. X Consult a qualified specialist workshop immediately.
The AdBlue® system is malfunctioning. A warning tone also sounds. X Visit a qualified specialist workshop.
278 Display messages
Display messages AdBlue: No start in ..km
AdBlue Engine start not possible
Possible causes/consequences and M Solutions The AdBlue® system is malfunctioning. A warning tone also sounds. X Visit a qualified specialist workshop immediately.
The AdBlue® system is malfunctioning. A warning tone also sounds. You can no longer start the engine. X Consult a qualified specialist workshop immediately.
Engine (12-button multifunction steering wheel) Display messages Top up coolant See Owner's Manual
Possible causes/consequences and M Solutions The coolant level is too low. ! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Top up the coolant, observing the warning notes before doing
so (Y page 331).
X If the coolant needs topping up more often than usual, have the engine coolant system checked at a qualified specialist work- shop.
? The fan motor is faulty.
X If the coolant temperature is below 120 † you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic.
Display messages
279
Display messages Coolant Stop vehi‐ cle Switch engine off
Possible causes/consequences and M Solutions The coolant is too hot. A warning tone also sounds. G WARNING Never drive with an overheated engine. Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. Steam from an overheated engine can cause serious burns, which can occur just by opening the bonnet. There is a risk of injury. X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 174). X Wait until the engine has cooled down. X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Do not start the engine again until the display message goes out and the coolant temperature is below 120 †. The engine may otherwise be damaged.
X Pay attention to the coolant temperature display. X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant level, the coolant temperature may rise to 120 †.
280 Display messages
Display messages # The battery is not being charged.
Possible causes/consequences and M Solutions
A warning tone also sounds. Possible causes: Rfaulty alternator Rtorn poly-V-belt Ra malfunction in the electronics X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 174). X Open the bonnet. 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.
Check eng. oil lev. when next refuelling
The engine oil level has dropped to the minimum level. A warning tone also sounds. X Check the oil level when next refuelling, at the latest
(Y page 329).
X If necessary, top up the engine oil (Y page 330). X Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual.
Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http:// bevo.mercedes-benz.com.
Reserve fuel level
The fuel level has dropped into the reserve range. Operation of the auxiliary heating is deactivated if the fuel level drops into the reserve range. X Refuel at the nearest filling station. C There is very little fuel in the fuel tank.
The auxiliary heating cannot be operated. X Refuel at the nearest filling station without fail.
Display messages
281
Display messages ¸ Replace air cleaner
Possible causes/consequences and M Solutions Vehicles with a diesel engine: the engine air filter is dirty and must be replaced. X Visit a qualified specialist workshop.
Clean the fuel fil‐ ter ¯ Refill AdBlue at workshop See Own‐ er's Manual ¯ Refill AdBlue at workshop No start in .. km ¯ Refill AdBlue at workshop Eng. start not possible ¯ Check AdBlue See Owner's Manual ¯ Eng. start not pos‐ sible in ..km ¯ Engine start not possible
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® level has fallen below the reserve range. A warning tone also sounds. X Have AdBlue® refilled as soon as possible at a qualified spe-
cialist workshop.
The AdBlue® level is only sufficient for the indicated distance. A warning tone also sounds. X Have AdBlue® refilled as soon as possible at a qualified spe-
cialist workshop.
The AdBlue® tank is empty. A warning tone also sounds. You can no longer start the engine. X Consult a qualified specialist workshop immediately.
The AdBlue® system is malfunctioning. A warning tone also sounds. X Visit a qualified specialist workshop.
The AdBlue® system is malfunctioning. A warning tone also sounds. X Visit a qualified specialist workshop immediately.
The AdBlue® system is malfunctioning. A warning tone also sounds. You can no longer start the engine. X Consult a qualified specialist workshop immediately.
282 Display messages
Driving systems (4-button multifunction steering wheel) Display messages ë Off
Possible causes/consequences and M Solutions The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. X Reactivate the HOLD function later (Y page 196).
The HOLD function is deactivated. When the brake pedal is firmly depressed, an activation condition is not fulfilled. A warning tone also sounds. X Check the activation conditions for the HOLD function
(Y page 196).
SPEEDTRONIC and cruise control are malfunctioning. A warning tone also sounds. X Visit a qualified specialist workshop.
While depressing the accelerator pedal beyond the pressure point (kickdown), SPEEDTRONIC cannot be activated.
A condition for activating cruise control has not been met. You have tried to store a speed below 30 km/h, for example. X If conditions permit, drive faster than 30 km/h and store the
speed.
X Check the activation conditions for cruise control
(Y page 183).
Only for certain countries: the maximum speed has been excee- ded. X Drive more slowly.
Cruise ctrl. / LIM Inoperative
Limit --- km/h Cruise control ¯--- km/h
120 km/h 120 km/h
Display messages
283
Driving systems (12-button multifunction steering wheel) Display messages À Attention Assist: Take a break!
Possible causes/consequences and M Solutions Based on certain criteria, ATTENTION ASSIST has detected fatigue or a lack of concentration on the part of the driver. A warning tone also sounds. X If necessary, take a break. During long journeys, take regular breaks in good time so that you get enough rest.
À Attention Assist inoperative à inoperative Speed Limit Assist currently unavail‐ able See Owner's Manual
Speed Limit Assist inoperative
ë Off
ATTENTION ASSIST is inoperative. X Visit a qualified specialist workshop.
DSR (Downhill Speed Regulation) is deactivated due to a fault. X Have DSR checked at a qualified specialist workshop.
Speed Limit Assist is deactivated and temporarily inoperative. Possible causes: Rthe windscreen is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. If the display message does not disappear: X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174). X Clean the windscreen. If the system detects that the camera is fully operational, the dis- play message disappears. Speed Limit Assist is operational again.
Speed Limit Assist is faulty. 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 (Y page 196).
The HOLD function is deactivated. When the brake pedal is firmly depressed, an activation condition is not fulfilled. A warning tone also sounds. X Check the activation conditions for the HOLD function
(Y page 196).
284 Display messages
Display messages Radar sensor deac‐ tivated See Own‐ er's Manual Lane Keeping Assist currently unavailable See Owner's Man‐ ualorActive Lane Keeping Assist cur‐ rently unavailable See Owner's Manual
Lane Keeping Assist inopera‐ tiveorActive Lane Keeping Assist inoperative Blind Spot Assist currently unavail‐ able See Owner's ManualorActive Blind Spot Assist currently unavail‐ able See Owner's Manual
Possible causes/consequences and M Solutions The radar sensor system is deactivated. X Switch on the radar sensor system (Y page 254).
Lane Keeping Assist or Active Lane Keeping Assist is deactivated and temporarily inoperative. Possible causes: Rthe windscreen 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, e.g. by dirt or snow. Once the causes listed above no longer apply, the display message goes out. Lane Keeping Assist or Active Lane Keeping Assist is operational again. If the display message does not disappear: X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174). X Clean the windscreen.
Lane Keeping Assist or Active Lane Keeping Assist is faulty. X Visit a qualified specialist workshop.
Blind Spot Assist or Active Blind Spot Assist is temporarily inop- erative. You have established the electrical connection between the trailer and your vehicle. X Press a on the steering wheel to confirm the display mes-
sage.
Blind Spot Assist or Active Blind Spot Assist is deactivated while towing a trailer.
Display messages
285
Display messages
Blind Spot Assist inopera‐ tiveorActive Blind Spot Assist inoper‐ ative Park Assist cancel‐ led
Possible causes/consequences and M Solutions Blind Spot Assist or Active Blind Spot Assist is temporarily inop- erative. Possible causes: Rthe sensors are dirty. Rthe 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 sta- tions or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior mir- rors. Once the causes listed above no longer apply, the display message goes out. Blind Spot Assist or Active Blind Spot Assist is operational again. If the display message does not disappear: X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174). X Clean the sensors (Y page 336). 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 mir- rors. X Visit a qualified specialist workshop.
The driver's door is open and the driver's seat belt has not been fastened. X Repeat the parking process with the seat belt fastened and the
driver's door closed.
You inadvertently touched the multifunction steering wheel while steering intervention was active. X While steering intervention is active, make sure not to touch the
multifunction steering wheel.
The vehicle has started to skid and ESP® has intervened. X Use Active Parking Assist again later (Y page 201).
286 Display messages
Display messages Park Assist inoper‐ ative
Possible causes/consequences and M Solutions You have just carried out a large number of turning or parking manoeuvres. Active Parking Assist will become available again after approx- imately ten minutes (Y page 201). X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Switch off and restart the engine. If the display message continues to be displayed: X Visit a qualified specialist workshop. PARKTRONIC is faulty. X Visit a qualified specialist workshop. The vehicle is parked. A warning tone also sounds. The display message disappears automatically.
deactivated automatically, a warning tone also sounds.
Park Assist switched off DISTRONIC PLUS off DISTRONIC PLUS has been deactivated (Y page 188). If it was DISTRONIC PLUS available again DISTRONIC PLUS cur‐ rently unavailable See Owner's Manual
DISTRONIC PLUS is operational again after having been tempo- rarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 188). DISTRONIC PLUS is temporarily inoperative. Possible causes: Rthe function is impaired due to heavy rain or snow. Rthe sensors in the radiator trim and in the bumpers are dirty. Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta- tions or other sources of electromagnetic radiation.
Rthe system is outside the operating temperature range. Rthe on-board voltage is too low. A warning tone also sounds. Once the causes listed above no longer apply, the display message goes out. DISTRONIC is operational again. If the display message does not disappear: X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174). X Clean the sensors in the radiator grille and the bumper
(Y page 336).
X Restart the engine.
Display messages
287
Display messages DISTRONIC PLUS inoperative
DISTRONIC PLUS inactive
DISTRONIC PLUS - - - km/h
DISTRONIC PLUS and SPEEDTRONIC
Cruise control and SPEEDTRONIC inop‐ erative Limit --- km/h Cruise control - - - km/h
120 km/h! Maximum speed exceeded
Possible causes/consequences and M Solutions 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 Remove your foot from the accelerator pedal. An activation condition for DISTRONIC PLUS is not fulfilled. X Check the activation conditions for DISTRONIC PLUS
(Y page 188).
DISTRONIC PLUS and SPEEDTRONIC are faulty. A warning tone also sounds. X Visit a qualified specialist workshop.
SPEEDTRONIC and cruise control are malfunctioning. A warning tone also sounds. X Visit a qualified specialist workshop.
While depressing the accelerator pedal beyond the pressure point (kickdown), SPEEDTRONIC cannot be activated.
A condition for activating cruise control has not been met. You have tried to store a speed below 30 km/h, for example. X If conditions permit, drive faster than 30 km/h and store the
speed.
X Check the activation conditions for cruise control
(Y page 183).
Only for certain countries: the maximum speed has been excee- ded. In addition, the multifunction display shows 120 km/h!. X Drive more slowly.
288 Display messages
Tyres (4-button multifunction steering wheel) Display messages Check tyres
Possible causes/consequences and M Solutions The tyre pressure loss warning system has detected a significant loss in pressure. A warning tone also sounds. G WARNING With tyre pressures which are too low, there is a risk of the fol- lowing hazards: Rthe tyres may burst, especially as the load and vehicle speed
increase.
Rthe tyres may wear excessively and/or unevenly, which may
greatly impair tyre traction.
Rthe driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 174). X Check the tyres and, if necessary, follow the instructions for a
X Check the tyre pressures and, if necessary, correct the tyre
flat tyre (Y page 342).
pressure.
Check tyres Restart system
Run Flat Indicator inoperative
X Restart the tyre pressure loss warning system when the tyre
pressure is correct (Y page 363).
The tyre pressure loss warning system generated a display mes- sage and has not been restarted since. X Set the correct tyre pressure in all four tyres. X Restart the tyre pressure loss warning system (Y page 363). The tyre pressure loss warning system is faulty. X Visit a qualified specialist workshop.
Display messages
289
Tyres (12-button multifunction steering wheel) Display messages Tyre pressure Check tyres
Possible causes/consequences and M Solutions The tyre pressure loss warning system has detected a significant loss in pressure. A warning tone also sounds. G WARNING With tyre pressures which are too low, there is a risk of the fol- lowing hazards: Rthe tyres may burst, especially as the load and vehicle speed
increase.
Rthe tyres may wear excessively and/or unevenly, which may
greatly impair tyre traction.
Rthe driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 174). X Check the tyres and, if necessary, follow the instructions for a
X Check the tyre pressures and, if necessary, correct the tyre
flat tyre (Y page 342).
pressure.
Run Flat Indicator then restart Run Flat Indicator
Run Flat Indicator inoperative Rectify tyre pressure
X Restart the tyre pressure loss warning system when the tyre
pressure is correct (Y page 363).
The tyre pressure loss warning system generated a display mes- sage and has not been restarted since. X Set the correct tyre pressure in all four tyres. X Restart the tyre pressure loss warning system (Y page 363). The tyre pressure loss warning system is faulty. X Visit a qualified specialist workshop. The tyre pressure is too low in at least one of the tyres, or the tyre pressure difference between the wheels is too great. X Check the tyre pressures at the next opportunity
(Y page 364).
X If necessary, correct the tyre pressure. X Restart the tyre pressure monitor (Y page 366).
290 Display messages
Display messages Check tyres
Possible causes/consequences and M Solutions The tyre pressure in one or more tyres has dropped significantly. The wheel position is displayed in the multifunction display. A warning tone also sounds. G WARNING With tyre pressures which are too low, there is a risk of the fol- lowing hazards: Rthe tyres may burst, especially as the load and vehicle speed
increase.
Rthe tyres may wear excessively and/or unevenly, which may
greatly impair tyre traction.
Rthe driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
Warning tyre defect
X Secure the vehicle against rolling away (Y page 174). X Check the tyres and, if necessary, follow the instructions for a
flat tyre (Y page 342).
X Check the tyre pressure (Y page 364). X If necessary, correct the tyre pressure. The tyre pressure in one or more tyres has dropped suddenly. The wheel position is displayed in the multifunction display. G WARNING If you drive with a flat tyre, there is a risk of the following hazards: Ra flat tyre affects the ability to steer or brake the vehicle. Ryou could lose control of the vehicle. Rcontinued driving with a flat tyre will cause excessive heat build-
up and possibly a fire.
There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 174). X Check the tyres and, if necessary, follow the instructions for a
flat tyre (Y page 342).
Display messages
291
Display messages Tyre press. monitor currently unavail‐ able
Wheel sensor(s) missing
Tyre press. moni‐ tor inoperative No wheel sensors
Tyre pressure mon‐ itor Inoperative
Possible causes/consequences and M Solutions Due to a source of radio interference, no signals can be received from the wheel sensors. The tyre pressure monitor is temporarily malfunctioning. X Drive on.
The tyre pressure monitor restarts automatically as soon as the cause has been rectified.
There is no signal from the tyre pressure sensor of one or several wheels. The pressure of the affected tyre is not displayed in the multifunction display. X Have the faulty tyre pressure sensor replaced at a qualified spe-
cialist workshop.
The wheels fitted do not have a suitable tyre pressure sensor. The tyre pressure monitor is deactivated. X Fit wheels with suitable tyre pressure sensors.
The tyre pressure monitor is activated automatically after driv- ing for a few minutes.
The tyre pressure monitor is faulty. X Visit a qualified specialist workshop.
Vehicle (4-button multifunction steering wheel) Display messages To start engine, shift to P or N
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.
Select Park (P)
You have switched off the engine with the Start/Stop button and opened the driver's door. You wanted to lock the vehicle. A warning tone also sounds. or You have switched off the engine with the Start/Stop button and opened the driver's door with the transmission in position N. X Shift the transmission to position P.
292 Display messages
Display messages A The tailgate is open.
Possible causes/consequences and M Solutions
G WARNING When the engine is running, exhaust gases can enter the vehicle interior if the tailgate is open. There is a risk of poisoning. X Close the tailgate.
? Vehicles with an anti-theft alarm system: the bonnet is open. A
warning tone also sounds. G WARNING The open bonnet may then block your view when the vehicle is in motion. There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174). X Close the bonnet.
C At least one door is open. A warning tone also sounds. Pwr. steering Malfunction
X Close all doors.
The power steering assistance is faulty. A warning tone also sounds. G WARNING You will need to use more force to steer. There is a risk of an accident. 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.
Top up washer fluid
The washer fluid level in the washer fluid reservoir has dropped below the minimum. X Top up the washer fluid (Y page 332).
Display messages
293
Vehicle (12-button multifunction steering wheel) Display messages To start engine, shift to either P or N Risk of rolling Select Park (P)
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.
You have switched off the engine with the Start/Stop button and opened the driver's door. You wanted to lock the vehicle. A warning tone also sounds. or You have switched off the engine with the Start/Stop button and opened the driver's door with the transmission in position N. X Shift the transmission to position P.
A The tailgate is open.
G WARNING When the engine is running, exhaust gases can enter the vehicle interior if the tailgate is open. There is a risk of poisoning. X Close the tailgate.
? Vehicles with an anti-theft alarm system: the bonnet is open. A
warning tone also sounds. G WARNING The open bonnet may then block your view when the vehicle is in motion. There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 174). X Close the bonnet.
C At least one door is open. A warning tone also sounds.
X Close all doors.
294 Display messages
Display messages inoperative Bat‐ tery low
inoperative Refuel vehicle inoperative See Owner's Manual
Ð Power steering mal‐ function See Own‐ er's Manual
Possible causes/consequences and M Solutions The on-board voltage is too low. The auxiliary heating has switched itself off or cannot be switched on (Y page 146). X Drive for a longer distance.
The battery is being charged. The auxiliary heating is operational again as soon as the on-board electrical system voltage is suf- ficient.
There is too little fuel in the fuel tank. The auxiliary heating cannot be switched on (Y page 146). X Refuel at the nearest filling station.
The auxiliary heating has a temporary malfunction or is faulty. X When the vehicle is on a level surface and the engine has cooled down, make up to four attempts to switch on the auxiliary heat- ing, waiting several minutes between each attempt (Y page 146).
X If the auxiliary heating does not switch on, consult a qualified
specialist workshop.
The power steering assistance is faulty. A warning tone also sounds. G WARNING You will need to use more force to steer. There is a risk of an accident. 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.
Telephone No service
Your vehicle is outside the network provider's transmitter/ receiver range. X Wait until the mobile phone operational readiness symbol
appears in the multifunction display.
¥ Top up washer fluid
The washer fluid level in the washer fluid reservoir has dropped below the minimum. X Top up the washer fluid (Y page 332).
Display messages
295
Key (4-button multifunction steering wheel) Display messages Key does not belong to vehicle You need a new key Change battery Key not detected (Red display message)
Possible causes/consequences and M Solutions You have put the wrong key in the ignition lock. X Use the correct key. The key 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 83).
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 Secure the vehicle against rolling away (Y page 174). 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 Secure the vehicle against rolling away (Y page 174). X Operate the vehicle with the 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 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.
Key not detected (White display mes- sage)
Key still in vehi‐ cle
296 Display messages
Display messages Insert key
Close doors to lock veh.
Possible causes/consequences and M Solutions KEYLESS-GO is temporarily malfunctioning or is defective. A warn- ing tone also sounds. X Insert the key 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.
Possible causes/consequences and M Solutions You have put the wrong key in the ignition lock. X Use the correct key.
The key 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 83).
Key (12-button multifunction steering wheel) Display messages  Key does not belong to vehicle  Replace key  Change key batter‐ ies  Key not detected (red display message)
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 Secure the vehicle against rolling away (Y page 174)
(Y page 174).
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 Secure the vehicle against rolling away (Y page 174). X Operate the vehicle with the key in the ignition lock if necessary.
Warning and indicator lamps in the instrument cluster
297
Display messages  Key not detected (white display mes- sage)
 Key still in vehi‐ cle  Remove starting button, then insert key
 Close doors to lock vehicle
Possible causes/consequences and M Solutions 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 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 is not continually detected. KEYLESS-GO is temporarily malfunctioning or is defective. A warn- ing tone also sounds. X Insert the key 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.
Warning and indicator lamps in the instrument cluster Seat belts Problem
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).
ü Only for certain coun- tries: the red seat belt warning lamp lights up for six seconds after the engine starts.
ü Only for certain coun- tries: the red seat belt warning lamp lights up after the engine starts. In addition, a warning tone sounds for up to six seconds.
