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Driving systems Display messages ABC Malfunction
ABC Malfunction Stop vehicle
Possible causes/consequences and M Solutions The ABC function (Active Body Control) is restricted. G WARNING The vehicle's suspension tuning characteristics may be affected. There is a risk of an accident. X Do not drive at speeds above 80 km/h. X Visit a qualified specialist workshop.
The vehicle level of the ABC 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. G WARNING The vehicle's suspension tuning characteristics may be affected. 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. Do not continue driving under any circumstances.
X Secure the vehicle against rolling away (Y page 172). X Consult a qualified specialist workshop. ABC is malfunctioning. The display message is shown continuously. G WARNING The suspension tuning characteristics are thus affected. There is a risk of an accident. 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 Visit a qualified specialist workshop.
256 Display messages
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 Speed Limit Assist currently unavail‐ able See Owner's Manual
Speed Limit Assist: Unavaila‐ ble in this country
Speed Limit Assist inoperative
ë Off Radar sensor deac‐ tivated See Own‐ er's Manual
ATTENTION ASSIST is inoperative. 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. 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 as soon as you drive into 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 193).
The radar sensor system is deactivated. X Check whether or not the radar sensor system may be activated
(Y page 595).
X Switch on the radar sensor system (Y page 237).
Display messages
257
Display messages Active Lane Keep‐ ing Assist cur‐ rently unavailable See Owner's Manual
Active Lane Keep‐ ing Assist inoper‐ ative Active Blind Spot Assist currently unavailable See Owner's Manual
Possible causes/consequences and M Solutions Active Lane Keeping Assist is deactivated and temporarily inop- erative. 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. 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 172). X Clean the windscreen.
Active Lane Keeping Assist is faulty. X Visit a qualified specialist workshop.
Active Blind Spot Assist is temporarily inoperative. Possible cau- ses: 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. 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 172). X Clean the sensors (Y page 539). X Restart the engine.
258 Display messages
Display messages Active Blind Spot Assist inoperative
Park Assist cancel‐ led
Park Assist inoper‐ ative
Possible causes/consequences and M Solutions 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 204). 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 204). 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.
Park Assist switched off DISTRONIC PLUS off DISTRONIC PLUS has been deactivated (Y page 181). DISTRONIC PLUS available again
DISTRONIC PLUS is operational again after having been tempo- rarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 181).
If it was deactivated automatically, a warning tone also sounds.
Display messages
259
Display messages DISTRONIC PLUS cur‐ rently unavailable See Owner's Manual
Possible causes/consequences and M Solutions 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.
DISTRONIC PLUS inoperative
DISTRONIC PLUS inactive
DISTRONIC PLUS --- km/h
DISTRONIC PLUS and SPEEDTRONIC inop‐ erative Cruise control and SPEEDTRONIC inop‐ erative
X Secure the vehicle against rolling away (Y page 172). X Clean the sensors in the radiator grille and the bumper
(Y page 539).
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 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 181).
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.
260 Display messages
Display messages Limit --- km/h Cruise control --- km/h
120 km/h Maximum speed exceeded
Possible causes/consequences and M Solutions 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 178).
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
261
Tyres Display messages Tyre pressure Check tyres
Check tyre pres‐ sures then restart Run Flat Indicator Run Flat Indicator inoperative Tyre pressures will be displayed after a few minutes of driving Tyre press. monitor inoperative
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 172). X If there is a flat tyre, inspect the tyres (Y page 546). X Check the tyre pressures and, if necessary, correct the tyre
pressure.
X Restart the tyre pressure loss warning system when the tyre
pressure is correct (Y page 567).
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 567). 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.
262 Display messages
Display messages Tyre press. moni‐ tor inoperative No wheel sensors
Check tyre(s)
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 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 172). X If there is a flat tyre, inspect the tyres (Y page 546). X Check the tyre pressure (Y page 568). X If necessary, correct the tyre pressure.
Display messages
263
Display messages Warning tyre defect
Possible causes/consequences and M Solutions 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.
Rectify tyre pressure
Wheel sensor(s) missing
Tyre press. monitor currently unavail‐ able
X Secure the vehicle against rolling away (Y page 172). X If there is a flat tyre, inspect the tyres (Y page 546). 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 568).
X If necessary, correct the tyre pressure. X Restart the tyre pressure monitor (Y page 569). 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.
264 Display messages
Display messages Tyre pressure Cau‐ tion Tyre malfunc‐ tion
Tyre pressure Check tyre(s)
Possible causes/consequences and M Solutions The tyre pressure in one or more tyres has dropped suddenly. 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 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 172). X If there is a flat tyre, inspect the tyres (Y page 546). 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 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 172). X If there is a flat tyre, inspect the tyres (Y page 546). X Check the tyre pressure (Y page 568). X If necessary, correct the tyre pressure. 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 568).
X If necessary, correct the tyre pressure.
Please correct tyre pressure
Display messages
265
Vehicle Display messages To start engine, shift to either P or N Auxiliary battery malfunction
Apply brake to deselect Park (P) position Vehicle not in position P
Without changing gear, consult workshop
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 at the next opportunity. X Until then, set the automatic transmission to position P before
you switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. X Secure the vehicle against rolling away (Y page 172). 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 Secure the vehicle against rolling away (Y page 172). 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 Park (P) when vehicle is stationary N The boot lid is open. X Close the boot lid.
266 Display messages
Display messages M The bonnet is open.
Possible causes/consequences and M Solutions
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 172). X Close the bonnet.
Active bonnet mal‐ function See Own‐ er's Manual C At least one door is open. A warning tone also sounds.
The active bonnet (pedestrian protection) is not active due to a malfunction or because it has already been triggered. X Visit a qualified specialist workshop.
X Close all doors.
Ð Power steering mal‐ function See Own‐ er's Manual
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.
Close boot separa‐ tor Close centre com‐ partment
The boot separator is open. X Close the boot separator (Y page 105).
The stowage space under the armrest is open. The interior motion sensor is not primed. X Close the stowage space under the armrest (Y page 513).
Display messages
267
Display messages Telephone No service
Possible causes/consequences and M Solutions 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.
Decrease speed
You wanted to open the roof while the vehicle was in motion. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Open the roof (Y page 103).
Vario-roof lower‐ ing Open/close vario- roof completely
Start engine See Owner's Manual
¥ Top up washer fluid Wiper malfunction‐ ing Hazard warning lamps malfunction‐ ing
The roof is not fully opened or closed. The hydraulics are depres- surised. X Fully open or close the roof (Y page 103).
The roof is not locked. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Push or pull the roof switch until the roof is fully open or closed
(Y page 103).
The on-board voltage is too low. X Start the engine. The roof has been opened and closed several times in a row. The roof drive has been switched off automatically for safety reasons. You can open and close the roof again after approximately ten minutes. X Switch off the ignition and turn it back on. X Repeat the opening or closing procedure (Y page 103). The washer fluid level in the washer fluid reservoir has dropped below the minimum. X Top up the washer fluid (Y page 534).
The windscreen wipers are defective. X Visit a qualified specialist workshop.
The hazard warning lamps are faulty. X Visit a qualified specialist workshop.
268 Display messages
Key Display messages  Key does not belong to vehicle  Replace key  Change key batter‐ ies  Key not detected (red display message)
 Key not detected (white display mes- sage)
 Key still in vehi‐ cle
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 87).
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 172). 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 172). 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.
Warning and indicator lamps
269
Display messages  Remove starting button, then insert key
 Close doors to lock vehicle
Possible causes/consequences and M Solutions 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 Safety Seat belts
Problem
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.
ü 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.
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 62).
The driver's seat belt is not fastened. X Fasten your seat belt (Y page 62).
The warning tone ceases.
The driver or passenger has not fastened their seat belt. X Fasten your seat belt (Y page 62).
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.
270 Warning and indicator lamps
Problem
ü The red seat belt warn- ing lamp flashes and an intermittent audible warning sounds.
Possible causes/consequences and M Solutions The driver or passenger has not fastened their seat belt. At the same time, the car is being driven faster than 25 km/h or has been briefly driven faster than 25 km/h. X Fasten your seat belt (Y page 62).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. At the same time, the car is being driven faster than 25 km/h or has been 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.
Warning and indicator lamps
271
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 brake fluid reservoir. G WARNING The braking efficiency may be impaired. 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. Do not continue driving under any circumstances.
X Secure the vehicle against rolling away (Y page 172). X Do not top up the brake fluid. Topping up will not rectify the
fault.
X Consult a qualified specialist workshop. X Observe the additional display messages in the multifunction
display.
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 and the adaptive brake lights are also deac- tivated, for example. ATTENTION ASSIST 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. If the ABS control unit is faulty, there is also a possibility that other systems, such as the navigation system or the automatic trans- mission, will not be available.
272 Warning and indicator lamps
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 and the adaptive brake lights, for example, are also deactivated. Possible causes: Rself-diagnosis is not yet complete. Rthe on-board voltage may be insufficient. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The front and rear 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. There is a risk of an accident. 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.
Warning and indicator lamps
273
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 not available due to a malfunction. Therefore, ABS, BAS, BAS PLUS, ESP®, PRE-SAFE®, PRE-SAFE® Brake, the HOLD func- tion, hill start assist and the adaptive brake lights, for example, are not available either. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The front and rear 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 not available due to a fault. Therefore, BAS, BAS PLUS, EBD, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function, hill start assist and the adaptive brake lights, for example, are not available either. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The front and rear 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.
274 Warning and indicator lamps
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.
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 75).
ESP® is deactivated. 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 75).
X Adapt your driving style to suit the road and weather conditions. If ESP® cannot be activated: X Drive on carefully. X Have ESP® checked at a qualified specialist workshop.
AMG vehicles only: The yellow SPORT han- dling mode warning lamp is lit while the engine is running.
SPORT handling mode is activated. G WARNING When SPORT handling mode is switched on, ESP® is unable to stabilise the vehicle. The danger of skidding and having an accident increases. X Only switch on SPORT handling mode in certain situations
(Y page 76).
Warning and indicator lamps
275
Problem
÷å The yellow ESP® and ESP® OFF warning lamps are 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®, BAS, BAS PLUS, PRE-SAFE®, PRE-SAFE® Brake, the HOLD function, hill start assist and the adaptive brake lights are not available due to a malfunction. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The braking distance in an emergency braking situation can thus 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.
ESP®, BAS, PRE-SAFE®, the HOLD function and hill start assist are temporarily unavailable. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. ATTENTION ASSIST is deactivated. self-diagnosis is not yet complete. G WARNING The brake system continues to function normally, but without the functions listed above. The braking distance in an emergency braking situation can thus 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.
276 Warning and indicator lamps
Problem
The red indicator lamp for the electric parking brake flashes or lights up 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.
Engine Problem
The yellow engine diag- nostics warning lamp lights up while the engine is running.
The yellow reserve fuel warning lamp lights up while the engine is run- ning.
Possible causes/consequences and M Solutions 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. This poses an increased risk of injury. X Drive on carefully. X Have SRS checked at a qualified specialist workshop immedi-
ately.
For further information about the Supplemental Restraint System; see (Y page 55).
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 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.
The fuel level has dropped into the reserve range. X Refuel at the nearest filling station.
Warning and indicator lamps
277
Problem
The red coolant warn- ing lamp lights up while the engine is running and the coolant tem- perature gauge is at the start of the scale.
Possible causes/consequences and M Solutions The temperature sensor for the coolant temperature gauge is faulty. The coolant temperature is no longer being monitored. There is a risk of engine damage if the coolant temperature is too high. X Stop the vehicle immediately, paying attention to road and traf- fic conditions, and switch off the engine. Do not continue driving under any circumstances.
X Secure the vehicle against rolling away (Y page 172). X Consult a qualified specialist workshop.
278 Warning and indicator lamps
Problem
The red coolant warn- ing lamp comes on while the engine is run- ning.
Possible causes/consequences and M Solutions The coolant level is too low. If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be mal- functioning. The coolant is too hot and the engine is no longer being cooled sufficiently. X Observe the additional display messages in the multifunction
display.
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 172). X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and top up the coolant, observing the
X If you have to top up the coolant frequently, have the engine
warning notes (Y page 533).
cooling system checked.
The red coolant warn- ing lamp comes on while the engine is run- ning. A warning tone also sounds.
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 coolant temperature is
below 120 †. The engine may otherwise be damaged.
X Drive 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.
The coolant temperature has exceeded 120 †. The airflow to the engine radiator may be blocked or the coolant level may be too low. G WARNING The engine is not being cooled sufficiently and may be damaged. 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 Observe the additional display messages in the multifunction
display.
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 172).
Warning and indicator lamps
279
Problem
Possible causes/consequences and M Solutions X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and top up the coolant, observing the
X If you have to top up the coolant frequently, have the engine
warning notes (Y page 533).
cooling system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
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.
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.
Further information on DISTRONIC PLUS (Y page 182). Further information on PRE-SAFE® Brake (Y page 78).
280 Warning and indicator lamps
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 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 172). X Observe the additional display messages in the multifunction
display.
X If there is a flat tyre, inspect the tyres (Y page 546). X Check the tyre pressure (Y page 568). X If necessary, correct the tyre pressure.
Useful information ............................ 282
Operating safety ............................... 282
At a glance ......................................... 283
System settings ................................ 303
Vehicle functions .............................. 308
Navigation ......................................... 314
Telephone .......................................... 378
Online and Internet functions .......... 418
Audio .................................................. 453
Video .................................................. 492281
282 Operating safety
Useful information
i These Operating Instructions describe all
the standard and optional equipment of your COMAND Online system, as available at the time of going to print. Country-spe- cific differences are possible. Please note that your COMAND Online system may not be equipped with all the features descri- bed. This is also the case for systems and functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 38).
Operating safety Important safety notes G WARNING Your attention must always be focused on the traffic conditions. Only use COMAND Online or the telephone when the road and traffic conditions permit. Bear in mind that, at a speed of only 50 km/h, your vehicle covers a distance of nearly 14 m per second. The navigation sys- tem does not provide you with information about stop signs, give way signs, traffic regu- lations or road safety features. It is up to you to pay attention to these while driving the vehicle. Only enter a new destination when the vehicle is stationary.
Declarations of conformity Wireless vehicle components The following information applies to all com- ponents of the vehicle and the COMAND Online system which receive and/or transmit radio waves: The components of this vehicle which receive and/or transmit radio waves are compliant with the basic requirements and other rele- vant provisions of Directive 1999/5/EC. You
can obtain further information from a Mercedes-Benz Service Centre.
Electromagnetic compatibility The electromagnetic compatibility of the vehi- cle components has been tested and approved in accordance with Directive 72/245/EEC or the equivalent ECE-R 10 reg- ulation, in their current respective valid ver- sion.
Correct use Observe the following information when using COMAND Online: Rthe safety notes in this manual Rtraffic rules and regulations Rlaws and safety standards pertaining to
motor vehicles
i Improper work on electronic components or other systems (e.g. radio, DVD changer) and their software may result in malfunc- tion or failure. Even systems that have not been modified could be affected because
