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If it is permitted to use mobile phones while the vehicle is in motion, you should only use them when the road and traffic conditions allow. Otherwise, you may be distracted from the traffic conditions, cause an accident and injure yourself and others.
X Switch on the mobile phone and COMAND
APS (Y page 134). X Press the = or ; button on the steer- ing wheel to select the Telephone menu. You will see one of the following display mes- sages in the multifunction display: RPlease enter PIN: the mobile phone has been placed in the mobile phone bracket and the PIN has not been entered.
X Enter the PIN using the mobile phone, LIN-
GUATRONIC or COMAND APS. The mobile phone will search for a network. RTelephone ready or the name of the net- work provider: the mobile phone has found a network and is ready to receive. RNo Service: no network is available, or the mobile phone is searching for a network.
Menus and submenus
403
Accepting a call If someone calls you when you are in the Telephonemenu, a display message appears in the multifunction display, for example:
When the multifunction display shows the Updating data... display message, COMAND APS has finished importing data. The multifunction display then shows all the phone book entries in COMAND APS and the mobile phone. X Press the = or ; button on the steer- ing wheel to select the Telephone menu. X Press the 9, : or a button to call
up the phone book.
X Press the 6 button on the steering wheel to accept an incoming call. If you are not in the Telephone menu, you can still accept a call.
Rejecting or ending a call X Press the ~ button on the steering wheel. If you are not in the Telephone menu, you can still reject or end a call.
Dialling a number from the phone book You can use the mobile phone to enter new telephone numbers into the phone book (see COMAND APS) (Y page 207). If your mobile phone is able to receive calls, you can search for and dial a number from the phone book. COMAND APS can download the phone book from the mobile phone. To do this, insert the mobile phone into the mobile phone cradle or establish a Bluetooth® connection to COMAND APS. This may take some time. While the on-board computer reads in the SIM card: Ryou can dial a telephone number from the redial list (Calls dialled list). Ryou can dial a telephone number from the telephone book stored in COMAND APS. Rthe multifunction display shows the Read‐ ing data... display message below the phone book entries.
X Press the 9 or : button to select the
desired name. To scroll rapidly, press and hold the : or 9 button for longer than one second. After skipping eight entries, the rapid scroll speeds up. Rapid scrolling stops when you release the button or reach the end of the list.
X If only one telephone number is stored for a name: press the 6 or a button to start dialling.
or X If there is more than one number for a particular name: press the 6 or a button to display the numbers.
X Press the 9 or : button to select the
number you want to dial.
X Press the 6 or a button to start dial-
ling.
or X If you do not want to make a call: press
the ~ or % button.
Redialling The on-board computer saves the last names or numbers dialled in the redial memory (Calls dialled list). X Press the = or ; button on the steer- ing wheel to select the Telephone menu. X Press the 6 button to switch to the
redial memory.
X Press the 9 or : button to select the
desired name or number.
404 Menus and submenus
To scroll rapidly, press and hold the : or 9 button for longer than one second. X Press the 6 or a button to start dial-
ling.
or X If you do not want to make a call: press
the ~ or % button.
Assistance menu Speed Limit Assist Displaying Speed Limit Assist In the Speed Limit Assist function, a detected speed limit is displayed under cer- tain conditions (Y page 371). X Press = or ; on the steering wheel to select the Assistance menu. X Press 9 or : to select Speed Limit Assist. X Press a.
The multifunction display shows Speed Limit Assist.
Activating/deactivating the Speed Limit Assist message function You can set Speed Limit Assist (Y page 371) to display a detected speed limit automati- cally for five seconds. Other messages in the multifunction display will be faded out for this length of time. X Press = or ; on the steering wheel to select the Assistance menu. X Press 9 or : to select Speed Limit Assist. X Press a.
The multifunction display shows Speed Limit Assist. X Press :.
The current selection is displayed.
X To activate or deactivate: press a. If Speed Limit Assist is operational and the message function is activated, the multifunc-
tion display shows the Ä symbol when the ignition is switched on.
Showing the distance display This function is only available with DIS- TRONIC PLUS. X Press = or ; on the steering wheel to select the Assistance menu. X Press the 9 or : button to select Distance display. X Press a.
The DISTRONIC PLUS distance display (Y page 354) appears in the multifunction display.
Deactivating/activating ESP® G WARNING If the ÷ warning lamp in the instrument cluster flashes, proceed as follows: RUnder no circumstances should you deac-
tivate ESP®.
RWhen pulling away, only depress the accel-
erator pedal as far as is necessary.
RAdapt your driving style to the prevailing
road and weather conditions.
The vehicle may otherwise begin to skid. If you drive too fast, ESP® cannot reduce the risk of an accident. ESP® cannot override the laws of physics.
For further information about ESP®, see (Y page 72). X Start the engine. X Press = or ; on the steering wheel to select the Assistance menu. X Press the 9 or : button to select ESP. X Press the a button. X To deactivate: press a again.
The å warning lamp in the instrument cluster comes on.
G WARNING If the å warning lamp in the instrument cluster lights up when the engine is running, ESP® is deactivated or is unavailable due to a malfunction. The risk that your vehicle may start to skid then increases in certain situa- tions. Always adapt your driving style to the prevail- ing road and weather conditions.
X To activate: press a again.
The å warning lamp in the instrument cluster goes out.
Activating/deactivating the PRE-SAFE® Brake PRE-SAFE® Brake is only available in vehicles with DISTRONIC PLUS. X Press = or ; on the steering wheel to select the Assistance menu. X Press 9 or : to select PRE-SAFE Brake. X Press the a button.
The current selection is displayed.
X To activate/deactivate: press a
again.
When PRE-SAFE® Brake (Y page 74) is acti- vated, the multifunction display shows the Ä symbol as long as the HOLD function is not activated (Y page 357).
Activating/deactivating ATTENTION ASSIST This function is not available in vehicles with HYBRID. X Press = or ; on the steering wheel to select the Assistance menu. X Press the 9 or : button to select Attention Assist. X Press a.
The current selection is displayed.
X To activate/deactivate: press a
again.
Menus and submenus
405
When ATTENTION ASSIST (Y page 370) is activated, the À symbol appears in the multifunction display when the ignition is on.
Activating/deactivating Blind Spot Assist You can use the Blind Spot Assist func- tion to activate or deactivate Blind Spot Assist (Y page 376) or Active Blind Spot Assist (Y page 380). X Press the = or ; button on the steer- ing wheel to select the Assistance menu. X Press 9 or : to select Blind Spot Assist. X Press the a button.
The current selection is displayed.
X To activate/deactivate: press the a
button again.
Activating/deactivating Lane Keeping Assist You can use the Lane Keeping Assist func- tion to activate/deactivate Lane Keeping Assist (Y page 378) or Active Lane Keeping Assist (Y page 382). X Press the = or ; button on the steer- ing wheel to select the Assistance menu. X Press 9 or : to select Lane Keep‐ ing Assist. X Press the a button.
The current selection is displayed.
X To activate/deactivate: press the a
button again.
When Lane Keeping Assist or Active Lane Keeping Assist is activated, the à symbol appears in the multifunction display when the ignition is on.
Service menu In the Service menu, you have the following options:
406 Menus and submenus
Rcalling up display messages (Y page 409) Rrestarting the tyre pressure loss warning system (Y page 521) or checking the tyre pressure electronically (Y page 522)
Rcalling up a service due date
(Y page 482)
Rchecking the oil level (Y page 477)
Settings menu Introduction The Settings menu can be used for: Rswitching the daytime driving lights on/off Rswitching the Intelligent Light System on/
off
Rsetting the dipped-beam headlamps for
driving on the left/right
Rswitching Adaptive Highbeam Assist on/
off
Rsetting permanent SPEEDTRONIC Rshowing or hiding the additional speedom-
eter
Rselecting the units for speed and distance Rswitching the belt adjustment on/off Ractivating/deactivating the radar sensor
system
Switching the daytime driving lights on/off If you have activated the Daytime driving lights and the light switch is in the $ or c position, the daytime driving lights are automatically switched on when the engine is running. Depending on light conditions, the side lamps and the dipped-beam headlamps will additionally light up. If you turn the light switch to a different posi- tion, the corresponding lights are switched on. If you switch off the daytime driving lights at night, make sure that the light switch is set to L or c. The factory setting is On.
X Switch off the engine. X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press the 9 or : button to select Daytime driving lights. X Press the a button to confirm. X To activate/deactivate: press a
again.
Switching the Intelligent Light System on/off If you activate the Intell. Light System function, you activate the following functions: Rmotorway mode Ractive light function Rcornering light function Rextended range foglamps X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press the 9 or : button to select Intell. Light System. X Press the a button to confirm. X To activate/deactivate: press a
again.
If you set the dipped-beam headlamps for driving on the right/left (Y page 406), the multifunction display shows the Intelli‐ gent Light System System inopera‐ tive Inactive for left-side traffic or Intelligent Light System System inoperative Inactive for right-side traffic display message instead of the Intell. Light System: function in the Settings menu. Setting the dipped-beam headlamps for driving on the left/right You can use this function to switch between symmetrical beam and asymmetrical dipped beam (Y page 290). If you set the dipped-beam headlamps for driving on the right/left, then motorway
Menus and submenus
407
mode and the extended range foglamps are not available. X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press : or 9 to select Dipped headlamps. X Press the a button to confirm. X Press the a button to save the setting. You can switch between Right-side traffic and Left-side traffic. When you change the setting, conversion does not take place until the next time the vehicle is stationary.
You can also have the dipped-beam head- lamps set for driving on the right or left at a qualified specialist workshop.
Switching Adaptive Highbeam Assist on/off X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press the : or 9 button to select Adapt.Main-beam Asst. X Press the a button to confirm. X To activate/deactivate: press the a
button again.
Setting permanent SPEEDTRONIC You can set permanent SPEEDTRONIC (Y page 348) using the SPEEDTRONIC func- tion. X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press the : or 9 button to select SPEEDTRONIC. X Press the a button to confirm. X Press a again. X Press : or 9 to adjust permanent SPEEDTRONIC in increments of 10 km/h (240 km/h to 160 km/h). The Off setting switches permanent SPEEDTRONIC off. X Press the a button to store the entry.
Switching the additional speedometer on/off An additional digital speedometer can be shown in the multifunction display. Vehicles with a kilometre speedometer: the digital speedometer has mph units. Vehicles with a miles speedometer: the digital speedometer has km/h units. X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press 9 or : to select Aux. speed‐ ometer. X Press the a button to confirm. X Press the a button to save the setting.
Selecting the unit of measurement for distance The Display unit Speed-/odometer: function allows you to choose whether cer- tain displays appear in kilometres or miles. The selected unit of measurement for dis- tance applies to: Ranalogue speedometers Rdigital speedometers in the Trip menu Rtotal distance recorder and the trip meter Rtrip computer Rnavigation instructions in the Navi menu Rcruise control RSPEEDTRONIC RDISTRONIC PLUS RASSYST PLUS service interval display The digital speedometer shows alternative speed units (Y page 407). X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press 9 or : to select Units. X Press a to confirm. X Press the a button to save the setting. The unit switches km/h and mph.
408 Menus and submenus
RPRE-SAFE® Brake (Y page 74) RBlind Spot Assist (Y page 376) RActive Blind Spot Assist (Y page 380) X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press 9 or : to select Radar sen‐ sors. X Press a to confirm. X To activate/deactivate: press the a
button again.
Switching the belt adjustment on/off For further information on belt adjustment, see (Y page 57). X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press the 9 or : button to select Belt adjustment. X Press a to confirm. X To activate/deactivate: press the a
button again.
Activating/deactivating the acoustic locking confirmation If you activate the Acoustic Lock Feedb. function, an audible signal sounds depending on the vehicle's date of manufacture: Rwhen locking
or
Ronce when unlocking and three times when
locking X Press the = or ; button on the steer- ing wheel to select the Settings menu. X Press the 9 or : button to select Acoustic Lock Feedb. X Press the a button to confirm. X To activate/deactivate: press a
again.
Activating/deactivating the radar sen- sor system i You must deactivate the radar sensor sys-
tem in certain countries and near radio telescope facilities. For further informa- tion, see (Y page 545).
Vehicles with a navigation system: the radar sensor system is deactivated automatically if you are close to radio telescope facilities. The following systems are switched off when the radar sensor system is deactivated: RDISTRONIC PLUS (Y page 348) RBAS PLUS (Y page 70)
Display messages
409
Display messages General notes Display messages appear in the multifunction display. Display messages with graphic displays may be shown in simplified form in the Owner's Manual and may differ from the messages shown in the multifunction display. Please respond in accordance with the display messages and follow the additional notes in this Owner's Manual. Certain display messages are accompanied by an audible warning tone or a continuous tone. When you stop and park the vehicle, please observe the notes on the HOLD function (Y page 357) and parking (Y page 339).
Hiding display messages You can hide some display messages with a low priority. X Press the a or % button on the steering wheel to hide the display message.
The display message is cleared.
Display messages with a low priority are shown in either yellow or white. Display messages with a high priority are shown in red. You cannot hide display messages of the highest priority. The multifunction display shows these messages continuously until the causes for the messages have been remedied.
Message memory The on-board computer saves certain display messages. You can call up the display messages in the message memory. X Press the = or ; button on the steering wheel and select the Service menu. If there are display messages, the multifunction display shows, for example, 2 messages. X Press the 9 or : button to select the entry, e.g. 2 messages. X Confirm with a. X Press the 9 or : button to scroll through the display messages. When the ignition is switched off, all display messages are deleted apart from some high- priority display messages. Once the causes of the high-priority display messages have been rectified, the corresponding display messages are also deleted.
410 Display messages
Safety systems Display messages !÷ currently unavail‐ able See Owner's Manual
Possible causes/consequences and M Solutions ABS (Anti-lock Braking System), ESP® (Electronic Stability Pro- gram), BAS (Brake Assist), PRE-SAFE®, the HOLD function, hill start assist and ESP® trailer stabilisation are temporarily not avail- able. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷, å and ! warning lamps light up in the instrument cluster. The self-diagnosis function may not be complete, for example. ATTENTION ASSIST29 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. X Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h. If the display message disappears, the functions mentioned above are available again.
If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop.
ABS, 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. In addition, the ÷, å and ! warning lamps light up in the instrument cluster. For example, the on-board voltage may be insufficient. ATTENTION ASSIST29 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. X Drive on carefully.
If the display message disappears, the functions mentioned above are available again.
29 Not available on hybrid vehicles.
Display messages
411
Display messages
!÷ inoperative See Owner's Manual
÷ currently inopera‐ tive See Owner's Manual
Possible causes/consequences and M Solutions If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop.
ABS, ESP®, BAS, PRE-SAFE®, the HOLD function, hill start assist and ESP® trailer stabilisation are not available due to a malfunc- tion. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the J, ÷, å and ! warning lamps light up in the instrument cluster. 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. ATTENTION ASSIST29 is deactivated. X Drive on carefully. X Visit a qualified specialist workshop immediately.
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. In addition, the ÷ and å warning lamps light up in the instrument cluster. The self-diagnosis function may not be complete, for example. ATTENTION ASSIST29 is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. X Carefully drive on a suitable stretch of road, making slight steer-
ing movements, at a speed above 20 km/h. If the display message disappears, the functions mentioned above are available again.
If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop.
29 Not available on hybrid vehicles.
412 Display messages
Display messages
÷ inoperative See Owner's Manual
å System inoperative
Possible causes/consequences and M Solutions G WARNING If the display message is shown and the ÷ warning lamp flashes at the same time, the electronic traction system is deactivated. The brakes of the drive wheels can overheat. X Let the brakes cool down until the display message disappears
and the ÷ warning lamp goes out. The electronic traction system is active again.
ESP®, BAS, PRE-SAFE®, the HOLD function, hill start assist and ESP® trailer stabilisation are not available due to a malfunction. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷ and å warning lamps light up in the instrument cluster. ATTENTION ASSIST29 is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. X Drive on carefully. X Visit a qualified specialist workshop. G WARNING ESP®, BAS, PRE-SAFE®, the HOLD function, hill start assist and ESP® trailer stabilisation are not available due to a malfunction. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷ and å warning lamps light up in the instrument cluster. ATTENTION ASSIST29 is deactivated. X Drive on carefully. X Visit a qualified specialist workshop.
29 Not available on hybrid vehicles.
Display messages
413
Display messages T! ÷ inoperative See Owner's Manual
Release parking brake
Possible causes/consequences and M Solutions EBD (electronic brake force distribution), ABS, ESP®, BAS, PRE- SAFE®, the HOLD function, hill start assist and ESP® trailer stabi- lisation are not available due to a malfunction. The adaptive brake lights, BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷, å and ! warning lamps light up in the instrument cluster and a warning tone sounds. ATTENTION ASSIST29 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 Drive on carefully. X Visit a qualified specialist workshop immediately.
The red ! indicator lamp flashes and a warning tone sounds. You are driving with the electric parking brake applied. X Release the electric parking brake. or X Pull away carefully (Y page 340).
The red ! indicator lamp flashes and a warning tone sounds. You are making an emergency stop using the electric parking brake (Y page 340). X After the emergency stop: release the electric parking brake
lever.
29 Not available on hybrid vehicles.
414 Display messages
Display messages
Parking brake See Owner's Manual
Possible causes/consequences and M Solutions The red ! indicator lamp flashes, the yellow ! warning lamp lights up and a warning tone sounds. The electric parking brake is faulty and the braking effect is restricted. While the vehicle is in motion: X Release the electric parking brake handle. While the vehicle is stationary: X Switch off the ignition and turn it back on. X Release the electric parking brake. If the display message continues to be displayed: X Move the transmission selector lever to P. X Use the folding wheel chock (Y page 499) from the vehicle tool
kit to secure the vehicle against rolling away.
X Consult a qualified specialist workshop. The yellow ! warning lamp lights up. In addition, the red ! warning lamp may light up. The electric parking brake is malfunctioning. To release: X Pull the electric parking brake handle. or X Pull away carefully. X Visit a qualified specialist workshop. To apply: X Switch the ignition off. X Push the electric parking brake handle for at least ten seconds,
until the display message disappears.
If the display message continues to be displayed: X Move the transmission selector lever to P. X Use the folding wheel chock (Y page 499) from the vehicle tool
kit to secure the vehicle against rolling away.
X Consult a qualified specialist workshop.
Display messages
415
Display messages
Possible causes/consequences and M Solutions The red ! indicator lamp flashes. The power supply for the electric parking brake was interrupted. X Pull the electric parking brake handle. or X Pull away carefully. or X Pull the electric parking brake handle until the display message
disappears.
The red ! indicator lamp flashes and the yellow ! warning lamp is lit. The electric parking brake is malfunctioning. X Switch off the ignition and turn it back on. X Apply or release the electric parking brake. or X Pull away carefully. X Visit a qualified specialist workshop. The yellow ! warning lamp lights up. The red ! indicator lamp flashes for about ten seconds after the electric parking brake has been applied or released. It then goes out or remains lit. The electric parking brake is malfunctioning, e.g. because of over- voltage or undervoltage. X Pull away carefully. X Visit a qualified specialist workshop. If there is overvoltage or undervoltage: X Remove the cause for the overvoltage or undervoltage, e.g. by
charging the battery or restarting the engine.
X Switch the ignition off and on, and then apply or release the
electric parking brake.
If this does not release the electric parking brake: X Do not drive on. X Consult a qualified specialist workshop.
416 Display messages
Display messages
Parking brake inop‐ erative
Turn on the igni‐ tion to release the parking brake
Check brake fluid level
Possible causes/consequences and M Solutions The yellow ! warning lamp lights up. The red ! indicator lamp flashes for about ten seconds after the electric parking brake has been applied or released. It then goes out or remains lit. The electric parking brake has overheated. X Allow the vehicle to cool down. Do not apply or release the
electric parking brake during this time.
X Use the folding wheel chock (Y page 499) from the vehicle tool
kit to secure the vehicle against rolling away.
X Once the vehicle has cooled down: switch the ignition off and
on again, then apply or release the electric parking brake.
The yellow ! warning lamp lights up. The red ! indicator lamp flashes for about ten seconds after the electric parking brake has been applied or released. It then goes out or remains lit. The electric parking brake is malfunctioning. X Switch the ignition off and on, and then apply the electric park-
ing brake.
If it is not possible to apply the electric parking brake: X Move the transmission selector lever to P. X Use the folding wheel chock (Y page 499) from the vehicle tool
kit to secure the vehicle against rolling away.
X Consult a qualified specialist workshop. The red ! indicator lamp is lit. You attempted to release the electric parking brake while the igni- tion was switched off. X Key: turn the key to position 1 in the ignition lock. X KEYLESS-GO: switch on the ignition. There is insufficient brake fluid in the brake fluid reservoir. In addi- tion, the red J warning lamp lights up in the instrument cluster and a warning tone sounds. 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 Secure the vehicle against rolling away (Y page 339). X Consult a qualified specialist workshop. X Do not top up the brake fluid. This does not correct the error.
Display messages
417
Display messages Service See Own‐ er's Manual
Check brake wear PRE-SAFE inoperative See Owner's Manual PRE-SAFE Function currently limited See Own‐ er's Manual
Possible causes/consequences and M Solutions There is a malfunction in the system. The brake system continues to operate normally. X Drive on carefully. X Visit a qualified specialist workshop. The brake pads/linings have reached their wear limit. X Visit a qualified specialist workshop.
Important functions of PRE-SAFE® have failed. All other occupant safety systems, e.g. airbags, remain available. X Visit a qualified specialist workshop immediately.
PRE-SAFE® Brake is 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. 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. PRE-SAFE® Brake is operational again.
PRE-SAFE® Brake is faulty. BAS PLUS or the distance warning sig- nal may also have failed. X Visit a qualified specialist workshop.
PRE-SAFE Function limited See Owner's Manual ü If the symbol appears in the multifunction display, a seat belt tongue has been inserted into a rear seat belt buckle. For further information on the status indicator for the rear seat belts, (Y page 58).
418 Display messages
Display messages ý If the symbol appears in the multifunction display, a seat belt
Possible causes/consequences and M Solutions
tongue has not been inserted in a rear seat belt buckle. G WARNING A seat belt which is not worn correctly, or which has not been engaged in the seat belt buckle correctly, cannot provide the intended level of protection. This poses an increased risk of injury. X If necessary, ask the occupants in the rear to fasten their seat
belts.
Child seat in wrong position See Owner's Manual
Restraint system malfunction Con‐ sult workshop
Front left-hand side malfunction Consult workshop or Front right- hand side malfunc‐ tion Consult work‐ shop
For further information on the status indicator for the rear seat belts, (Y page 58). G WARNING Vehicles with automatic child seat recognition on the front- passenger seat: the child seat is positioned incorrectly. X Fit the child seat in the correct position. G WARNING Vehicles with automatic child seat recognition on the front- passenger seat: the automatic child seat recognition sensor is faulty. X Visit a qualified specialist workshop. There is a malfunction in the SRS (Supplemental Restraint Sys- tem). The 6 warning lamp also lights up in the instrument clus- ter. 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 Visit a qualified specialist workshop.
SRS has malfunctioned at the front on the left or right. The 6
warning lamp also lights up in the instrument cluster. 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 Visit a qualified specialist workshop.Display messages
419
Display messages Rear left-hand side malfunction Consult workshop or Rear right-hand side malfunction Consult workshop
Rear centre mal‐ function Consult workshop
Left windowbag mal‐ function Consult workshop or Right windowbag malfunc‐ tion Consult work‐ shop
Possible causes/consequences and M Solutions SRS has malfunctioned at the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster. 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 Visit a qualified specialist workshop. SRS has malfunctioned at the rear centre. The 6 warning lamp also lights up in the instrument cluster. 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 Visit a qualified specialist workshop. There is a malfunction in the left-hand and/or right-hand window- bag. The 6 warning lamp also lights up in the instrument cluster. G WARNING The left or right windowbag may either be triggered unintentionally or, in the event of an accident, may not be triggered. This poses an increased risk of injury. X Visit a qualified specialist workshop.Lights i Display messages about LEDs:
This display message will only appear if all LEDs have failed.
420 Display messages
Display messages Left-hand corner‐ ing light or Right- hand cornering light Left-hand dipped beam or Right-hand dipped beam
Trailer Left-hand tail lamp or Trailer Right-hand tail lamp Trailer Left-hand turn signal or Trailer Right-hand turn signal Trailer Brake lamp
Rear left-hand turn signal or Rear right-hand turn signal Front left-hand turn signal or Front right-hand turn signal
Possible causes/consequences and M Solutions The left or right-hand cornering light is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand dipped-beam headlamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand trailer tail lamp is faulty. X Check whether you are permitted to change the bulb yourself. or X Visit a qualified specialist workshop.
The left or right-hand trailer turn signal lamp is faulty. X Check whether you are permitted to change the bulb yourself. or X Visit a qualified specialist workshop.
The trailer brake lamp is faulty. X Check whether you are permitted to change the bulb yourself. or X Visit a qualified specialist workshop. The rear left-hand or rear right-hand turn signal is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The front left-hand or front right-hand turn signal is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
Display messages Turn signal in left-hand exterior mirror or Turn sig‐ nal in right-hand exterior mirror Third brake lamp
Left-hand tail lamp/brake lamp or Right-hand tail lamp/brake lamp Left-hand main beam or Right-hand main beam
Left-hand licence plate lamp orRight- hand licence plate lamp Left-hand foglamp or Right-hand fog‐ lamp
Display messages
421
Possible causes/consequences and M Solutions The turn signal in the left-hand or right-hand exterior mirror is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop. The third brake lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand tail lamp/brake lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand high beam is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand licence plate lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left-hand or right-hand front foglamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
422 Display messages
Display messages Rear left-hand fog‐ lamp or Rear right- hand foglamp
Front left-hand parking lamp or Front right-hand parking lamp Left-hand revers‐ ing lamp or Right- hand reversing lamp
Left-hand daytime driving lamp or Right-hand 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 rear foglamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The front left or front right parking lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand reversing lamp is faulty. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or X Visit a qualified specialist workshop.
The left or right-hand daytime driving lamp is defective. X Check whether you are permitted to change the bulb yourself
(Y page 297).
or 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 511). 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 AUTO lights inoper‐ ative
Switch off lights
Adaptive Main-beam Assist inoperative
Engine Display messages Top up coolant See Owner's Manual
Display messages
423
Possible causes/consequences and M Solutions The light sensor is faulty. X Switch off the daytime driving lights in the on-board computer
(Y page 406).
X Switch the lights on and off using the light switch. X Visit a qualified specialist workshop.
The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to $ or c. or X If the rear foglamp is switched on: press the light switch in to
the stop.
Adaptive Highbeam Assist is faulty. X Visit a qualified specialist workshop.
Possible causes/consequences and M Solutions The coolant level is too low. X Top up the coolant, observing the warning notes when doing so
(Y page 480).
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.
424 Display messages
Display messages Coolant Stop vehi‐ cle Turn engine off
Possible causes/consequences and M Solutions The coolant is too hot. X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by frozen slush.
X Wait until the display message disappears before restarting the
engine. 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.
# The battery is not being charged.
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.
Check engine oil level when next refuelling
Vehicles with an oil dipstick: the oil level has dropped to the min- imum level. X Check the oil level when next refuelling, at the latest
(Y page 477).
X If necessary, top up the engine oil (Y page 479). X Have the engine checked at a qualified specialist workshop if
the engine oil needs topping up more often than usual.
Top up with 1 litre of engine oil when next refu‐ elling
Vehicles without an oil dipstick: the engine oil level is too low. X Check the oil level (Y page 477). X If necessary, top up the engine oil (Y page 479). X Have the engine checked for leaks if the engine oil needs top-
ping up more often than usual.
Display messages
425
Display messages Engine oil level Stop vehicle Turn engine off
Engine oil level Reduce oil level
Engine oil level cannot be measured Reserve fuel level
Possible causes/consequences and M Solutions Vehicles without an oil dipstick: the engine oil level is too low. There is a risk of engine damage. X Stop the vehicle immediately, paying attention to road and traf-
fic conditions, and switch off the engine.
X Apply the parking brake. X Top up the engine oil (Y page 479) and check the oil level
(Y page 477).
Vehicles without an oil dipstick: you have added too much engine oil. There is a risk of damage to the engine or to the catalytic converter. X Have the excess oil siphoned off at a qualified specialist work-
shop. Observe the legal requirements.
Vehicles without an oil dipstick: the measuring system is faulty. X Visit a qualified specialist workshop.
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.
C There is only a very small amount of fuel in the fuel tank.
· Replace air cleaner
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. Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off. X Visit a qualified specialist workshop.
Clean fuel filter
Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off. X Visit a qualified specialist workshop.
¯ Refill AdBlue at workshop See Own‐ er's Manual
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.
426 Display messages
Display messages ¯ Refill AdBlue at workshop No start in ..km ¯ Refill AdBlue at workshop Eng. start not poss. ¯ Check AdBlue See Owner's Manual ¯ AdBlue Eng. start not poss. in ..km ¯ AdBlue Eng. start not poss.
Driving systems Display messages À Attention Assist: Drowsiness detec‐ ted
À Attention Assist inoperative
Possible causes/consequences and M Solutions 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.
