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The AdBlue® system is malfunctioning. A warning tone also sounds. You can no longer start the engine. X Consult a qualified specialist workshop immediately.
Possible causes/consequences and M Solutions Based on specific criteria, ATTENTION ASSIST30 has determined that the driver is tired or paying less attention. 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.
ATTENTION ASSIST30 has failed. X Visit a qualified specialist workshop.
30 Not available on hybrid vehicles.
Display messages
427
Display messages Á Night View Assist inoperative Á Night View Assist currently unavail‐ able
Á Night View Assist Lights must be on or set to AUTO Á Night View Assist Not in Reverse Á Night View Assist Lights on or AUTO, not in reverse Á Night View Assist only when it is dark ¨ Vehicle rising ¨ Vehicle rising Please wait briefly
Possible causes/consequences and M Solutions Night View Assist Plus is faulty. X Visit a qualified specialist workshop.
The temperature of the camera is too high. X Wait until you see the Night View Assist available again display message. You can also: X Fold the camera cover down (Y page 487). X Adjust the air distribution of the automatic air conditioning
upwards.
A condition for activating Night View Assist Plus has not been met. X Turn the light switch to c or L.
A condition for activating Night View Assist Plus has not been met. X Shift the transmission to P, N or D.
A condition for activating Night View Assist Plus has not been met. X Turn the light switch to c or L. X Shift the transmission to P, N or D.
You have attempted to activate Night View Assist Plus in the day- time. Night View Assist Plus can only be activated when it is dark.
Your vehicle is adjusting to the level you have selected.
The vehicle level is too low when the vehicle is stationary. A warn- ing tone also sounds. X Do not pull away.
The vehicle level is set when the display message disappears.
428 Display messages
Display messages ¨ STOP vehicle Vehi‐ cle too low
¨ Malfunction
ABC Malfunction Stop vehicle
Possible causes/consequences and M Solutions 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 Secure the vehicle against rolling away (Y page 339). X Wait until the display message disappears before pulling away. AIRMATIC is faulty. A warning tone also sounds. X Do not drive at speeds above 80 km/h. X Make only slight steering movements. Otherwise, the front
wings or the tyres could be damaged if 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. The AIRMATIC function is restricted. The vehicle's handling char- acteristics may be affected. X Do not drive at speeds above 80 km/h. X Visit a qualified specialist workshop. The ABC (Active Body Control) vehicle level is too low. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. After a few seconds, the vehicle level is adjusted and the display message disappears.
The vehicle is leaking oil. The display message is shown continuously. 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 Consult a qualified specialist workshop.
Display messages
429
Display messages
ABC Vehicle rising Please wait briefly ABC Malfunction
Speed Limit Assist currently unavail‐ able See Owner's Manual
Speed Limit Assist Unavailable in this country
Speed Limit Assist inoperative ë off
Possible causes/consequences and M Solutions The display message is shown continuously. ABC is malfunctioning. X Do not drive at speeds above 80 km/h. X Make only slight steering movements. Otherwise, the front wing or the tyre could be damaged if the steering movement is too large.
X Listen for scraping sounds. X Visit a qualified specialist workshop. The ABC vehicle level is too low when the vehicle is stationary. X Do not pull away.
The vehicle level is set when the display message disappears.
The ABC function is restricted. The vehicle's handling character- istics may be affected. X Do not drive at speeds above 80 km/h. X Visit 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 339). 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 only available in certain countries. X Drive on.
Speed Limit Assist is available again when you drive in a country in which its use is approved.
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 357).
430 Display messages
Display messages
Radar sensor deactivated autom. See Owner's Manual
Radar sensor deactivated See Owner's Manual
Lane Keeping Assist currently unavailable See Owner's Manual or Active Lane Keep‐ ing Assist cur‐ rently unavailable See Owner's Manual
Possible causes/consequences and M Solutions 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 357).
Vehicles with a navigation system: the vehicle is close to a radio telescope facility and is therefore prohibited from transmitting any radar signals. The radar sensor system has switched off automat- ically (Y page 545). DISTRONIC PLUS (Y page 348) is deactivated automatically if it is activated. A warning tone also sounds. Blind Spot Assist (Y page 376) or Active Blind Spot Assist (Y page 380) is deactivated automatically if it is activated. The yellow 9 indicator lamps also light up in the exterior mirrors. BAS PLUS (Brake Assist PLUS) (Y page 70) and PRE-SAFE® Brake (Y page 74) are also not available. X Drive on.
Once you have moved far enough away from the radio telescope, the above functions are available again.
The radar sensor system is deactivated. X Check whether or not the radar sensor system may be activated
(Y page 545).
X Activate the radar sensor system (Y page 408). 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. 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 Engage the electric parking brake. X Clean the windscreen. If the system detects that the camera is fully operational, the dis- play message disappears. Lane Keeping Assist or Active Lane Keeping Assist is operational again.
Display messages
431
Display messages Lane Keeping Assist inopera‐ tive or Active Lane Keeping Assist inoperative Blind Spot Assist currently unavail‐ able See Owner's Manual or Active Blind Spot Assist currently unavail‐ able See Owner's Manual
Blind Spot Assist inoperative or Active Blind Spot Assist inoperative Parking Guidance inoperative
Possible causes/consequences and M Solutions 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. Possible causes: RYou have established the electrical connection between the
trailer and your vehicle.
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. X When towing a trailer, confirm the display message with a. If you are driving without a trailer and 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 Engage the electric parking brake. X Clean the sensors (Y page 487). X Restart the engine. If the system detects that the sensors are fully operational, the display message disappears. Blind Spot Assist or Active Blind Spot Assist is operational again.
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. Parking Guidance is malfunctioning (Y page 365). X Restart the engine. If the display message continues to be displayed: X Visit a qualified specialist workshop.
432 Display messages
Display messages Parking Guidance cancelled
Parking Guidance cancelled DISTRONIC PLUS off DISTRONIC PLUS available again
Possible causes/consequences and M Solutions Parking Guidance is deactivated. Possible causes: Rthe vehicle is skidding. Rthe sensors are dirty. Ra malfunction has occurred. X Reactivate Parking Guidance later (Y page 365). If the parking space symbol does not appear in the multifunction display at speeds below 30 km/h: X Clean the sensors (Y page 487). X Restart the engine. If the parking space symbol still does not appear in the multifunc- tion display at speeds below 30 km/h: X Visit a qualified specialist workshop. Parking Guidance has been deactivated because you are no longer following the recommended path. 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 deactivated (Y page 348). If it was deactivated automatically, a warning tone also sounds.
DISTRONIC PLUS is operational again after having been tempo- rarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 348).
Display messages
433
Display messages DISTRONIC PLUS currently unavail‐ able See Owner's Manual
Possible causes/consequences and M Solutions DISTRONIC is deactivated and temporarily inoperative. Possible causes: Rthe DISTRONIC PLUS cover in the radiator grille is dirty. Rthe function is impaired due to heavy rain or snow. 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 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. 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 339). X Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 487).
X Clean the bumpers (Y page 487). X Restart the engine. If the system detects that the sensors are fully operational, the display message disappears. DISTRONIC is operational again. 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 348).
DISTRONIC PLUS and SPEEDTRONIC are faulty. A warning tone also sounds. X Visit a qualified specialist workshop.
DISTRONIC PLUS inoperative
DISTRONIC PLUS override
DISTRONIC PLUS --- km/h
DISTRONIC PLUS and SPEEDTRONIC inoperative
434 Display messages
Display messages Cruise control and SPEEDTRONIC inoperative Limit --- km/h Cruise control inoperative Cruise control --- km/h
120 km/h Maximum speed exceeded
Possible causes/consequences and M Solutions 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.
Cruise control is faulty. X Visit a qualified specialist workshop. 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 344).
Only for certain countries: the maximum speed has been excee- ded. In addition, the multifunction display shows 120 km/h!. X Drive more slowly.
Display messages
435
Tyres 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 accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X Check the tyres and, if necessary, change the wheel
X Check the tyre pressures and, if necessary, set to the correct
(Y page 524).
tyre pressure.
Check tyre pres‐ sures and then restart Run Flat Indicator Run Flat Indicator inoperative Tyre pressures displayed after driving a few minutes Tyre press. monitor inoperative
X Restart the tyre pressure loss warning system when the tyre
pressure is correct (Y page 521).
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 521). The tyre pressure loss warning system is faulty. X Visit a qualified specialist workshop. The tyre pressure monitor is measuring the tyre pressure. X Drive on.
The tyre pressures appear in the multifunction display after you have been driving for a few minutes.
The tyre pressure monitor is faulty. X Visit a qualified specialist workshop.
436 Display messages
Display messages Tyre press. monitor inoperative No wheel sensors
Check tyre(s)
Caution, tyre defect
Possible causes/consequences and M Solutions 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 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 accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X Correct the tyre pressure (Y page 522). X If necessary, change a wheel (Y page 524). The tyre pressure in one or more tyres has dropped suddenly. The wheel position is displayed in the multifunction display. A warning tone also sounds. 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 accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X If necessary, change a wheel (Y page 524).
Display messages
437
Display messages Please correct tyre pressure(s)
Wheel sensor(s) missing
Tyre press. monitor currently unavail‐ able
Tyre pressure Cau‐ tion, tyre defect
Possible causes/consequences and M Solutions 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. If necessary,
correct the tyre pressure (Y page 522).
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.
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.
The tyre pressure in one or more tyres has dropped suddenly. 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 accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X If necessary, change a wheel (Y page 524).
438 Display messages
Display messages Tyre pressure Check tyre(s)
Possible causes/consequences and M Solutions The tyre pressure in one or more tyres has dropped significantly. 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 accident.
X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X If necessary, change a wheel (Y page 524). X Check the tyre pressure. If necessary, correct the tyre pressure
(Y page 522).
Please correct tyre pressure(s)
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. If necessary,
correct the tyre pressure (Y page 522).
Vehicle Display messages To start the engine, shift to either P or N Auxiliary battery malfunction (White display mes- sage)
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.
Display messages
439
Display messages Auxiliary battery malfunction (Red display message)
Apply brake to shift out of position P Vehicle not in position P
Drive to workshop without changing gear
Possible causes/consequences and M Solutions The auxiliary battery for the automatic transmission is discharged. If there is a malfunction in the vehicle's electrical system, you may not be able to change the transmission position. 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 Consult 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. X Shift the transmission to position P. X Secure the vehicle against rolling away (Y page 339). 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.
If transmission position R, N or P is selected: X Consult a qualified specialist workshop. 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.
Only select posi‐ tion P when vehicle is stationary N The boot lid is open. X Close the boot lid.
440 Display messages
Display messages M The bonnet is open.
Possible causes/consequences and M Solutions
G WARNING The open bonnet may then block your view when the vehicle is in motion. There is a risk of 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 339). X Close the bonnet.
C At least one door is open.
X Close all doors.
Power steering mal‐ function See Own‐ er's Manual
The power steering assistance is faulty. G WARNING You will need to use more force to steer. There is a risk of 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.
inoperative Bat‐ tery low
The on-board voltage is too low. The auxiliary heating has switched itself off or cannot be switched on (Y page 312). 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.
inoperative Refuel vehicle
There is too little fuel in the fuel tank. The auxiliary heating cannot be switched on (Y page 312). X Refuel at the nearest filling station.
Display messages
441
Display messages inoperative See Owner's Manual
Possible causes/consequences and M Solutions The auxiliary heating has a temporary malfunction or is faulty. X Once 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 312).
X If the auxiliary heating does not switch on, consult a 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 481).
Key Display messages  Key does not belong to vehicle  Replace key  Change key batter‐ ies  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 339). X Locate the KEYLESS-GO key.
442 Display messages
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 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 339). 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 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.
KEYLESS-GO is temporarily malfunctioning or is defective. 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
443
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 55).
Only for certain coun- tries: the red seat belt warning lamp lights up for six seconds after the engine starts.
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.
The red seat belt warn- ing lamp lights up after the engine starts, as soon as the driver's or the front-passenger door is closed.
The red seat belt warn- ing lamp flashes and an intermittent audible warning sounds.
The driver's seat belt is not fastened. X Fasten your seat belt (Y page 55).
The warning tone ceases.
The driver or front passenger has not fastened their seat belt. X Fasten your seat belt (Y page 55).
The warning lamp goes out.
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.
The driver or front passenger has not fastened their seat belt. At the same time, you are driving faster than 25 km/h or have briefly driven faster than 25 km/h. X Fasten your seat belt (Y page 55).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. At the same time, you are driving faster than 25 km/h or have briefly driven faster than 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 warning tone ceases.
444 Warning and indicator lamps in the instrument cluster
Safety systems Problem
The red brake system warning lamp comes on while the engine is run- ning. A warning tone also sounds.
The yellow ABS warning lamp is lit while the engine is running.
Possible causes/consequences and M Solutions There is insufficient brake fluid in the fluid reservoir. G WARNING The braking efficiency may be impaired. There is a risk of accident. 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 electric parking brake. X Consult a qualified specialist workshop immediately. X Observe the additional display messages in the multifunction
display.
Do not top up the brake fluid. This does not correct the error. ABS (Anti-lock Brake System) has been deactivated due to a fault. For this reason, BAS (Brake Assist), BAS PLUS, ESP® (Electronic Stability Program), PRE-SAFE®, PRE-SAFE® Brake, the HOLD func- tion, hill start assist, the adaptive brake lights and ESP® trailer stabilisation are also deactivated, for example. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affec- ted. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. ATTENTION ASSIST31 is deactivated. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
31 Not available on hybrid vehicles.
Warning and indicator lamps in the instrument cluster
445
Problem
The yellow ABS warning lamp is lit while the engine is running.
Possible causes/consequences and M Solutions ABS is temporarily unavailable. Therefore, BAS, BAS PLUS, ESP®, EBD (electronic brake force distribution), PRE-SAFE®, PRE-SAFE® Brake, the HOLD function, hill start assist, the adaptive brake lights and ESP® trailer stabilisation, for example, are also deactivated. Self-diagnosis is not yet complete or the on-board voltage may be insufficient, for example. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affec- ted. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. ATTENTION ASSIST31 is deactivated. X Carefully drive on a suitable stretch of road, making slight steer-
ing movements at a speed above 20 km/h. The functions mentioned above are available again when the warning lamp goes out.
If the warning lamp is still on: X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
31 Not available on hybrid vehicles.
446 Warning and indicator lamps in the instrument cluster
Problem
The yellow ABS warning lamp is lit while the engine is running. A warning tone also sounds.
J÷å! 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.
Possible causes/consequences and M Solutions EBD is faulty. Therefore, ABS, BAS, BAS PLUS, ESP®, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function, hill start assist, the adaptive brake lights and ESP® trailer stabilisation, for example, are not available either. ATTENTION ASSIST31 is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affec- ted. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
ABS and ESP® are malfunctioning. Therefore, BAS, BAS PLUS, EBD, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function, hill start assist, the adaptive brake lights and ESP® trailer stabilisation, for example, are not available either. ATTENTION ASSIST31 is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affec- ted. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
31 Not available on hybrid vehicles.
Warning and indicator lamps in the instrument cluster
447
Problem
÷ The yellow ESP® warn- ing lamp flashes while the vehicle is in motion.
å The yellow ESP® OFF warning lamp is lit while the engine is running.
÷å The yellow ESP® and ESP® OFF warning lamps are lit while the engine is running.
Possible causes/consequences and M Solutions 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 PLUS is deactivated. X Only depress the accelerator pedal as far as necessary when
pulling away.
X Accelerate more gently while the vehicle is in motion. X Adapt your driving style to suit the road and weather conditions. X Do not deactivate ESP®.
For exceptions, see: (Y page 72).
ESP® and ESP® trailer stabilisation are deactivated. ESP® will not stabilise the vehicle if it starts to skid or if a wheel starts to spin. G WARNING If ESP® is switched off, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. X Reactivate ESP®.
For exceptions, see: (Y page 72).
X Adapt your driving style to suit the road and weather conditions. If ESP® cannot be activated: X Have ESP® checked at a qualified specialist workshop.
ESP®, BAS, BAS PLUS, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function, hill start assist, the adaptive brake lights and ESP® trailer stabilisation are not available due to a malfunction. ATTENTION ASSIST31 is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
31 Not available on hybrid vehicles.
448 Warning and indicator lamps in the instrument cluster
Problem
÷å The yellow ESP® and ESP® OFF warning lamps are lit while the engine is running.
Possible causes/consequences and M Solutions ESP®, BAS, PRE-SAFE®, the HOLD function, hill start assist and ESP® trailer stabilisation are temporarily not available. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. Self-diagnosis is not yet complete. ATTENTION ASSIST31 is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. X Carefully drive on a suitable stretch of road, making slight steer-
ing movements at a speed above 20 km/h. The functions mentioned above are available again when the warning lamp goes out.
If the warning lamp is still on: X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
31 Not available on hybrid vehicles.
Warning and indicator lamps in the instrument cluster
449
Problem
The red indicator lamp for the electric parking brake flashes and/or the yellow warning lamp for the electric parking brake lights up.
The red SRS warning lamp is lit while the engine is running.
Possible causes/consequences and M Solutions The electric parking brake is temporarily malfunctioning or is defective. X Observe the additional display messages in the multifunction
display.
There is a malfunction in the SRS (Supplemental Restraint Sys- tem). G WARNING The airbags or belt tensioners may either be triggered uninten- tionally or, in the event of an accident, may not be triggered at all. This poses an increased risk of injury. X Drive on carefully. X Visit a qualified specialist workshop immediately.
450 Warning and indicator lamps in the instrument cluster
Engine Problem
The yellow engine diag- nostics warning lamp lights up while the engine is running.
Possible causes/consequences and M Solutions There may be a fault, for example: Rin the engine management Rin the fuel injection system Rin the exhaust system Rin the ignition system (for vehicles with petrol engines) Rin the fuel system The emission limit values may be exceeded and the engine may be running in emergency mode. X Have the vehicle checked as soon as possible at a qualified
specialist workshop.
Vehicles with a diesel engine: the fuel tank has been run dry (Y page 338). X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emer- gency running mode is cancelled. The vehicle need not be checked.
The yellow reserve fuel warning lamp lights up while the engine is run- ning.
The fuel level has dropped into the reserve range. Operation of the auxiliary heating is deactivated when the fuel level drops into the reserve range. X Refuel at the nearest filling station.
Driving systems Problem
· The red distance warn- ing lamp lights up while the vehicle is in motion.
· The red distance warn- ing lamp lights up while the vehicle is in motion. A warning tone also sounds.
Possible causes/consequences and M Solutions The distance to the vehicle in front is too small for the speed selected. X Increase the distance.
You are approaching a vehicle or a stationary obstacle in your line of travel at too high a speed. X Be prepared to brake immediately. X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
More information about DISTRONIC PLUS (Y page 348) and PRE-SAFE® Brake (Y page 74).
Warning and indicator lamps in the instrument cluster
451
Tyres Problem
The yellow tyre pres- sure monitor warning lamp is on.
Possible causes/consequences and M Solutions The tyre pressure monitor has detected a loss of pressure in at least one of the tyres. 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 accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.
X Observe the additional display messages in the multifunction
display.
X Check the tyre pressure. If necessary, correct the tyre pressure
(Y page 522).
X If necessary, change a wheel (Y page 524).
452
453
Useful information ............................ 454
Loading guidelines ............................ 454
Stowage areas .................................. 454
Features ............................................. 461454 Stowage areas
Useful information
i This Owner's Manual describes all models
and all standard and optional equipment available to your vehicle at the time of pub- lication of the Owner's Manual. Country- specific deviations are possible. Please note that your vehicle may not be equipped with all features described. This also applies to safety-relevant systems and functions.
i Please read the information on qualified
specialist workshops (Y page 32).
Loading guidelines
G WARNING Secure and position the load as described in the loading guidelines. Otherwise, vehicle occupants could be injured by the load being thrown around in the event of sharp braking, a sudden change in direction or an accident. You will find further information in the "Secur- ing a load" section. Even if you follow all the loading guidelines, the load will increase the risk of injury in the event of an accident. G WARNING Keep the boot lid closed while the vehicle is in operation. Otherwise, you could be pois- oned by exhaust fumes entering the vehicle.
The handling characteristics of a laden vehi- cle are dependent on the distribution of the load within the vehicle. For this reason, you should observe the following notes when transporting a load: Rwhen transporting a load, never exceed the maximum permissible gross vehicle weight
or the permissible axle loads for the vehicle (including occupants).
Rposition heavy loads as far forwards as pos- sible and as low down in the boot as pos- sible.
Rthe load must not protrude above the upper
edge of the seat backrests.
Ralways place the load against the rear seat
backrests.
Ralways place the load behind unoccupied
seats if possible.
Rsecure the load with sufficiently strong and wear-resistant lashing material. Pad sharp edges for protection.
i Lashing material is available at any quali-
fied specialist workshop.
Stowage areas Stowage compartments Important safety notes G WARNING The stowage compartments must be closed when items are stored in them. Luggage nets are not designed to secure heavy items of luggage. You or other vehicle occupants could be injured by objects being thrown around if you: Rbrake sharply Rchange direction suddenly Rhave an accident Sharp-edged and fragile objects must not be carried in the luggage net. Do not carry hard objects in the ruffled pock- ets. Objects must not protrude over the top
