2013 Mercedes-benz C Class Coupe Owners Manual

attention to road and traffic conditions. Do not continue driving under any circumstances.

X Secure the vehicle against rolling away (Y page 169). X Consult a qualified specialist workshop. X Do not top up the brake fluid. This does not correct the fault.

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.

250 Display messages

Display messages PRE-SAFE Functions cur‐ rently limited See Owner's Manual

Possible causes/consequences and M Solutions PRE-SAFE® Brake 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.

RAMG vehicles: ESP® is deactivated. Rthe system is outside the operating temperature range. Rthe on-board voltage is too low. Once the causes listed above no longer apply, the display message goes out. PRE-SAFE® Brake 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 169). X Clean the sensors in the radiator grille and the bumper

(Y page 322).

X Restart the engine. X AMG vehicles: reactivate ESP®(Y page 75).

PRE-SAFE Functions limited See Owner's Manual ü If the symbol appears in the multifunction display, a seat belt

PRE-SAFE® Brake is inoperative due to a fault. BAS PLUS or the distance warning signal may also have failed. X Visit a qualified specialist workshop.

tongue has been inserted into a rear seat belt buckle. Further information on the status indicator for the rear seat belts (Y page 58).

Display messages

251

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 (Y page 57).

Restraint sys. mal‐ function Consult workshop

Front left malfunc‐ tion Consult work‐ shoporFront right malfunction Con‐ sult workshop

Further information on the status indicator for the rear seat belts (Y page 58). 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. For further information about the Supplemental Restraint System; see (Y page 49). 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.

252 Display messages

Display messages Rear left malfunc‐ tion Consult work‐ shoporRear right malfunction Con‐ sult workshop

Left windowbag mal‐ function Consult workshoporRight windowbag malfunc‐ tion Consult work‐ shop

Possible causes/consequences and M Solutions 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. SRS has malfunctioned at the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster. 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 (4-button multifunction steering wheel) i Display messages about LEDs:

This display message will only appear if all the LEDs have failed. Display messages Left cornering light or Right cor‐ nering light

Possible causes/consequences and M Solutions The left or right-hand cornering light is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

Left dipped beam  or Right dipped beam

Trailer left tail lamp or Trailer right tail lamp

The left or right-hand dipped-beam headlamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left or right-hand trailer tail lamp is faulty. X Observe the separate operating instructions provided by the

trailer manufacturer.

Display messages Trailer left indic. or Trailer right indic. Trailer brake lamp

Rear left indica‐ tor or Rear right indicator Front left indica‐ tor or Front right indicator Left mirror indica‐ tor or Right mir‐ ror indicator Third brake lamp Tail/brake lamp, left or Tail/brake lamp, right

Left main beamorRight main beam

Left fog lamp or  Right fog lamp

Display messages

253

Possible causes/consequences and M Solutions The left or right-hand trailer turn signal lamp is faulty. X Observe the separate operating instructions provided by the

trailer manufacturer.

The trailer brake lamp is faulty. X Observe the separate operating instructions provided by the

trailer manufacturer.

The rear left-hand or rear right-hand turn signal is faulty. X Visit a qualified specialist workshop.

The front left-hand or front right-hand turn signal is faulty. X Visit a qualified specialist workshop.

The turn signal in the left-hand or right-hand exterior mirror is faulty. X Visit a qualified specialist workshop.

The third brake lamp is faulty. X Visit a qualified specialist workshop.

The left or right-hand tail lamp/brake lamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left or right-hand main-beam headlamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left-hand or right-hand front foglamp is faulty. X Visit a qualified specialist workshop.

254 Display messages

Display messages Rear foglamp Front left parking lamp or Front right parking lamp

Left revers. lamporRight rev‐ ers. lamp

Rear left marker lamp or Rear right marker lamp Left daytime driv‐ ing lamporRight daytime driving lamp Malfunction

Malfunction

Possible causes/consequences and M Solutions The rear foglamp is faulty. X Visit a qualified specialist workshop.

The front left or front right parking lamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The reversing lamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The rear left or right side marker lamp is faulty. X Visit a qualified specialist workshop.

The left-hand or right-hand daytime driving lamp is faulty. 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 343). 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. The exterior lighting is faulty. X Visit a qualified specialist workshop.

Display messages

255

Display messages AUTO lights inoper‐ ative Switch off lights

Possible causes/consequences and M Solutions The light sensor is faulty. X Visit a qualified specialist workshop.

The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to Ã.

Lights (12-button multifunction steering wheel) i Display messages about LEDs:

This display message will only appear if all the LEDs have failed. Display messages Left cornering light or Right cor‐ nering light

Possible causes/consequences and M Solutions The left or right-hand cornering light is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

Left dipped beam  or Right dipped beam

Trailer left tail lamp or Trailer right tail lamp Trailer left turn signal or Trailer right turn signal Trailer brake lamp

The left or right-hand dipped-beam headlamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left or right-hand trailer tail lamp is faulty. X Observe the separate operating instructions provided by the

trailer manufacturer.

The left or right-hand trailer turn signal lamp is faulty. X Observe the separate operating instructions provided by the

trailer manufacturer.

The trailer brake lamp is faulty. X Observe the separate operating instructions provided by the

trailer manufacturer.

256 Display messages

Display messages Rear left turn sig‐ nal or Rear right turn signal Front left turn signal or Front right turn signal Left mirror turn signal or Right mirror turn signal Third brake lamp Left-hand tail lamp/brake lamp or  Right-hand tail lamp/brake lamp Left main beamorRight main beam

Left fog lamporRight fog lamp Rear fog lamp

Possible causes/consequences and M Solutions The rear left-hand or rear right-hand turn signal is faulty. X Visit a qualified specialist workshop.

The front left-hand or front right-hand turn signal is faulty. X Visit a qualified specialist workshop.

The turn signal in the left-hand or right-hand exterior mirror is faulty. X Visit a qualified specialist workshop.

The third brake lamp is faulty. X Visit a qualified specialist workshop.

The left or right-hand tail lamp/brake lamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left or right-hand main-beam headlamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left-hand or right-hand front foglamp is faulty. X Visit a qualified specialist workshop.

The rear foglamp is faulty. X Visit a qualified specialist workshop.

Display messages

257

Display messages Front left parking lamp or Front right parking lamp

Left revers. lamp  or Right revers. lamp

Rear left side marker lamp or  Rear right side marker lamp Left daytime driv‐ ing lamporRight daytime driving lamp Intell. Light Sys‐ tem inoperative Malfunction See Owner's Manual

AUTO lights inoper‐ ative

Possible causes/consequences and M Solutions The front left or front right parking lamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 125).

or X Visit a qualified specialist workshop.

The left or right-hand reversing lamp is faulty. X Check whether you are permitted to replace the bulb yourself

(Y page 126).

or X Visit a qualified specialist workshop.

The rear left or right side marker lamp is faulty. X Visit a qualified specialist workshop.

The left-hand or right-hand daytime driving lamp is faulty. X Visit a qualified specialist workshop.

The Intelligent Light System is faulty. The lights remain available without the Intelligent Light System. X Visit a qualified specialist workshop.

The exterior lighting is faulty. X Visit a qualified specialist workshop. Vehicles with trailer tow hitch: a fuse may have blown. X Check the fuses (Y page 343). 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. The light sensor is faulty. X Visit a qualified specialist workshop.

258 Display messages

Display messages Switch off lights Adaptive Highbeam Assist inoperative Adaptive Highbeam Assist currently unavailable See Owner's Manual

Possible causes/consequences and M Solutions The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to Ã.

Adaptive Highbeam Assist is faulty. X Visit a qualified specialist workshop.

Adaptive Highbeam Assist is deactivated and temporarily inoper- ative. Possible causes: Rthe windscreen is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. X Clean the windscreen. If the system detects that the camera is fully operational again, the Adaptive Highbeam Assist available again message is displayed. Adaptive Highbeam Assist is operational again.

Engine (4-button multifunction steering wheel) Display messages Coolant washer fluid

Possible causes/consequences and M Solutions The coolant level is too low. X Top up the coolant, observing the warning notes before doing

so (Y page 318).

X If the coolant needs topping up more often than usual, have the engine coolant system checked at a qualified specialist work- shop.

? The fan motor is faulty.

X If the coolant temperature is below 120 † you can continue

driving to the nearest qualified specialist workshop.

X Avoid heavy loads on the engine as you do so, e.g. driving in

mountainous terrain and stop-start traffic.

Display messages

259

Display messages Stop vehicle Sw. eng. Off

Possible causes/consequences and M Solutions The coolant is too hot. A warning tone also sounds. G WARNING Never drive with an overheated engine. Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. Steam from an overheated engine can cause serious burns, which can occur just by opening the bonnet. There is a risk of injury. X Stop the vehicle immediately, paying attention to road and traf-

fic conditions, and switch off the engine.

X Secure the vehicle against rolling away (Y page 169). X Wait until the engine has cooled down. X Make sure that the air supply to the engine radiator is not

blocked, e.g. by frozen slush.

X Do not start the engine again until the display message goes out and the coolant temperature is below 120 †. The engine may otherwise be damaged.

X Pay attention to the coolant temperature display. X If the temperature increases again, visit a qualified specialist

workshop immediately.

Under normal operating conditions and with the specified coolant level, the coolant temperature may rise to 120 †.

# The battery is not being charged.

A warning tone also sounds. Possible causes: Rfaulty alternator Rtorn poly-V-belt Ra malfunction in the electronics X Stop the vehicle immediately, paying attention to road and traf-

fic conditions, and switch off the engine.

X Open the bonnet. X Check whether the poly-V-belt is torn. If the poly-V-belt is torn: ! Do not continue driving. The engine could otherwise overheat. X Consult a qualified specialist workshop. If the poly-V-belt is OK: X Visit a qualified specialist workshop.

260 Display messages

Display messages Checking the engine oil level

Possible causes/consequences and M Solutions The engine oil level has dropped to the minimum level. A warning tone also sounds. X Check the oil level when next refuelling, at the latest

(Y page 316).

X If necessary, top up the engine oil (Y page 317). X Have the engine checked at a qualified specialist workshop if

the engine oil needs topping up more often than usual.

Reserve fuel level

The fuel level has dropped into the reserve range. Operation of the auxiliary heating is deactivated if the fuel level drops into the reserve range. X Refuel at the nearest filling station. C There is very little fuel in the fuel tank.

The auxiliary heating cannot be operated. X Refuel at the nearest filling station without fail. Vehicles with a diesel engine: the engine air filter is dirty and must be replaced. X Visit a qualified specialist workshop.

Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off. X Visit a qualified specialist workshop.

¸ Replace air cleaner

Clean the fuel fil‐ ter

Display messages

261

Engine (12-button multifunction steering wheel) Display messages Top up coolant See Owner's Manual

Possible causes/consequences and M Solutions The coolant level is too low. ! Avoid making long journeys with too little coolant in the engine

cooling system. The engine will otherwise be damaged.

X Top up the coolant, observing the warning notes before doing

so (Y page 318).

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.

Coolant Stop vehi‐ cle Switch engine off

X Avoid heavy loads on the engine as you do so, e.g. driving in

mountainous terrain and stop-start traffic.

The coolant is too hot. A warning tone also sounds. G WARNING Never drive with an overheated engine. Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. Steam from an overheated engine can cause serious burns, which can occur just by opening the bonnet. There is a risk of injury. X Stop the vehicle immediately, paying attention to road and traf-

fic conditions, and switch off the engine.

X Secure the vehicle against rolling away (Y page 169). X Wait until the engine has cooled down. X Make sure that the air supply to the engine radiator is not

blocked, e.g. by frozen slush.

X Do not start the engine again until the display message goes out and the coolant temperature is below 120 †. The engine may otherwise be damaged.

X Pay attention to the coolant temperature display. X If the temperature increases again, visit a qualified specialist

workshop immediately.

Under normal operating conditions and with the specified coolant level, the coolant temperature may rise to 120 †.

262 Display messages

Display messages # The battery is not being charged.

Possible causes/consequences and M Solutions

A warning tone also sounds. Possible causes: Rfaulty alternator Rtorn poly-V-belt Ra malfunction in the electronics X Stop the vehicle immediately, paying attention to road and traf-

fic conditions, and switch off the engine.

X Secure the vehicle against rolling away (Y page 169). X Open the bonnet. X Check whether the poly-V-belt is torn. If the poly-V-belt is torn: ! Do not continue driving. The engine could otherwise overheat. X Consult a qualified specialist workshop. If the poly-V-belt is OK: X Visit a qualified specialist workshop.

Check eng. oil lev. when next refuelling

Add 1 litre engine oil when next refu‐ elling

The engine oil level has dropped to the minimum level. A warning tone also sounds. X Check the oil level when next refuelling, at the latest

(Y page 316).

X If necessary, top up the engine oil (Y page 317). X Have the engine checked at a qualified specialist workshop if

the engine oil needs topping up more often than usual.

Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http:// bevo.mercedes-benz.com.

AMG vehicles: the engine oil level is too low. X Check the oil level when next refuelling, at the latest

(Y page 316).

X If necessary, top up the engine oil (Y page 317). X Have the engine checked at a qualified specialist workshop if

the engine oil needs topping up more often than usual.

Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http:// bevo.mercedes-benz.com.

Display messages

263

Display messages Reserve fuel level

Possible causes/consequences and M Solutions The fuel level has dropped into the reserve range. Operation of the auxiliary heating is deactivated if the fuel level drops into the reserve range. X Refuel at the nearest filling station. C There is very little fuel in the fuel tank.

The auxiliary heating cannot be operated. X Refuel at the nearest filling station without fail. Vehicles with a diesel engine: the engine air filter is dirty and must be replaced. X Visit a qualified specialist workshop.

Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off. X Visit a qualified specialist workshop.

¸ Replace air cleaner

Clean the fuel fil‐ ter

Driving systems (4-button multifunction steering wheel) Display messages ë Off

Possible causes/consequences and M Solutions The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. X Reactivate the HOLD function later (Y page 188).

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 188).

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 ctrl. / LIM Inoperative

Limit --- km/h

264 Display messages

Display messages Cruise control ¯--- km/h

120 km/h 120 km/h

Possible causes/consequences and M Solutions 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 174).

Only for certain countries: the maximum speed has been excee- ded. X Drive more slowly.

Driving systems (12-button multifunction steering wheel) Display messages À Attention Assist: Take a break!

Possible causes/consequences and M Solutions Based on certain criteria, ATTENTION ASSIST has detected fatigue or a lack of concentration on the part of the driver. A warning tone also sounds. X If necessary, take a break. During long journeys, take regular breaks in good time so that you get enough rest.

À Attention Assist inoperative Speed Limit Assist currently unavail‐ able See Owner's Manual

Speed Limit Assist inoperative

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. 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 169). X Clean the windscreen. If the system detects that the camera is fully operational, the dis- play message disappears. Speed Limit Assist is operational again.

Speed Limit Assist is faulty. X Visit a qualified specialist workshop.

Display messages

265

Display messages ë Off

Possible causes/consequences and M Solutions The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. X Reactivate the HOLD function later (Y page 188).

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 188).

The radar sensor system is deactivated. X Switch on the radar sensor system (Y page 234).

Lane Keeping Assist or Active Lane Keeping Assist is deactivated and temporarily inoperative. Possible causes: Rthe windscreen is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. Rthere are no lane markings for a longer period. Rthe lane markings are worn, dark or covered, e.g. by dirt or snow. Once the causes listed above no longer apply, the display message goes out. Lane Keeping Assist or Active Lane Keeping Assist is operational again. If the display message does not disappear: X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Secure the vehicle against rolling away (Y page 169). X Clean the windscreen.

Lane Keeping Assist or Active Lane Keeping Assist is faulty. X Visit a qualified specialist workshop.

Radar sensor deac‐ tivated See Own‐ er's Manual Lane Keeping Assist currently unavailable See Owner's Man‐ ualorActive Lane Keeping Assist cur‐ rently unavailable See Owner's Manual

Lane Keeping Assist inopera‐ tiveorActive Lane Keeping Assist inoperative

266 Display messages

Display messages Blind Spot Assist currently unavail‐ able See Owner's ManualorActive Blind Spot Assist currently unavail‐ able See Owner's Manual

Blind Spot Assist inopera‐ tiveorActive Blind Spot Assist inoper‐ ative Parking Guidance inoperative

Possible causes/consequences and M Solutions Blind Spot Assist or Active Blind Spot Assist is temporarily inop- erative. You have established the electrical connection between the trailer and your vehicle. X Press a on the steering wheel to confirm the display mes-

sage.

Blind Spot Assist or Active Blind Spot Assist is deactivated while towing a trailer.

Blind Spot Assist or Active Blind Spot Assist is temporarily inop- erative. Possible causes: Rthe sensors are dirty. Rthe function is impaired due to heavy rain or snow. Rthe radar sensor system is outside the operating temperature

range.

Rthe radar sensor system is temporarily inoperative, e.g. due to

electromagnetic radiation emitted by nearby TV or radio sta- tions or other sources of electromagnetic radiation.

The yellow 9 indicator lamps also light up in the exterior mir- rors. Once the causes listed above no longer apply, the display message goes out. Blind Spot Assist or Active Blind Spot Assist is operational again. If the display message does not disappear: X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Secure the vehicle against rolling away (Y page 169). X Clean the sensors (Y page 322). X Restart the engine. Blind Spot Assist or Active Blind Spot Assist is faulty. The yellow 9 indicator lamps also light up in the exterior mir- rors. X Visit a qualified specialist workshop.

Parking Guidance is malfunctioning (Y page 194). X Restart the engine. If the display message continues to be displayed: X Visit a qualified specialist workshop.

Display messages Parking Guidance cancelled

Display messages

267

Possible causes/consequences and M Solutions Parking Guidance is deactivated. Possible causes: Rthe vehicle is skidding. Rthe sensors are dirty. Ra malfunction has occurred. A warning tone also sounds. X Reactivate Parking Guidance later (Y page 194). If the parking space symbol does not appear in the multifunction display at speeds below 30 km/h: X Clean the sensors (Y page 322). 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.

Parking Guidance finished DISTRONIC PLUS off DISTRONIC PLUS has been deactivated (Y page 179). If it was DISTRONIC PLUS available again

DISTRONIC PLUS is operational again after having been tempo- rarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 179).

deactivated automatically, a warning tone also sounds.

268 Display messages

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.

X Secure the vehicle against rolling away (Y page 169). X Clean the sensors in the radiator grille and the bumper

(Y page 322).

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 179).

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.

DISTRONIC PLUS inoperative

DISTRONIC PLUS inactive

DISTRONIC PLUS - - - km/h

DISTRONIC PLUS and SPEEDTRONIC

Cruise control and SPEEDTRONIC inop‐ erative

Display messages

269

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 174).

Only for certain countries: the maximum speed has been excee- ded. In addition, the multifunction display shows 120 km/h!. X Drive more slowly.

270 Display messages

Tyres (4-button multifunction steering wheel) Display messages Check tyres

Possible causes/consequences and M Solutions The tyre pressure loss warning system has detected a significant loss in pressure. A warning tone also sounds. G WARNING With tyre pressures which are too low, there is a risk of the fol- lowing hazards: Rthe tyres may burst, especially as the load and vehicle speed

increase.

Rthe tyres may wear excessively and/or unevenly, which may

greatly impair tyre traction.

Rthe driving characteristics, as well as steering and braking, may

be greatly impaired.

There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.

X Secure the vehicle against rolling away (Y page 169). X Check the tyres and, if necessary, follow the instructions for a

X Check the tyre pressures and, if necessary, correct the tyre

flat tyre (Y page 330).

pressure.

Check tyres Restart system

Run Flat Indicator inoperative

X Restart the tyre pressure loss warning system when the tyre

pressure is correct (Y page 351).

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 351). The tyre pressure loss warning system is faulty. X Visit a qualified specialist workshop.

Display messages

271

Tyres (12-button multifunction steering wheel) Display messages Tyre pressure Check tyres

Possible causes/consequences and M Solutions The tyre pressure loss warning system has detected a significant loss in pressure. A warning tone also sounds. G WARNING With tyre pressures which are too low, there is a risk of the fol- lowing hazards: Rthe tyres may burst, especially as the load and vehicle speed

increase.

Rthe tyres may wear excessively and/or unevenly, which may

greatly impair tyre traction.

Rthe driving characteristics, as well as steering and braking, may

be greatly impaired.

There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.

X Secure the vehicle against rolling away (Y page 169). X Check the tyres and, if necessary, follow the instructions for a

X Check the tyre pressures and, if necessary, correct the tyre

flat tyre (Y page 330).

pressure.

Run Flat Indicator then restart Run Flat Indicator

Run Flat Indicator inoperative Rectify tyre pressure

X Restart the tyre pressure loss warning system when the tyre

pressure is correct (Y page 351).

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 351). The tyre pressure loss warning system is faulty. X Visit a qualified specialist workshop. The tyre pressure is too low in at least one of the tyres, or the tyre pressure difference between the wheels is too great. X Check the tyre pressures at the next opportunity

(Y page 353).

X If necessary, correct the tyre pressure. X Restart the tyre pressure monitor (Y page 355).

272 Display messages

Display messages Check tyres

Possible causes/consequences and M Solutions The tyre pressure in one or more tyres has dropped significantly. The wheel position is displayed in the multifunction display. A warning tone also sounds. G WARNING With tyre pressures which are too low, there is a risk of the fol- lowing hazards: Rthe tyres may burst, especially as the load and vehicle speed

increase.

Rthe tyres may wear excessively and/or unevenly, which may

greatly impair tyre traction.

Rthe driving characteristics, as well as steering and braking, may

be greatly impaired.

There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.

Warning tyre defect

X Secure the vehicle against rolling away (Y page 169). X Check the tyres and, if necessary, follow the instructions for a

flat tyre (Y page 330).

X Check the tyre pressure (Y page 353). X If necessary, correct the tyre pressure. The tyre pressure in one or more tyres has dropped suddenly. The wheel position is displayed in the multifunction display. G WARNING If you drive with a flat tyre, there is a risk of the following hazards: Ra flat tyre affects the ability to steer or brake the vehicle. Ryou could lose control of the vehicle. Rcontinued driving with a flat tyre will cause excessive heat build-

up and possibly a fire.

There is a risk of an accident. X Stop the vehicle without making any sudden steering or braking manoeuvres. Pay attention to the traffic conditions as you do so.

X Secure the vehicle against rolling away (Y page 169). X Check the tyres and, if necessary, follow the instructions for a

flat tyre (Y page 330).

Display messages

273

Display messages Tyre press. monitor currently unavail‐ able

Wheel sensor(s) missing

Tyre press. moni‐ tor inoperative No wheel sensors

Tyre pressure mon‐ itor inoperative

Possible causes/consequences and M Solutions Due to a source of radio interference, no signals can be received from the wheel sensors. The tyre pressure monitor is temporarily malfunctioning. X Drive on.

The tyre pressure monitor restarts automatically as soon as the cause has been rectified.

There is no signal from the tyre pressure sensor of one or several wheels. The pressure of the affected tyre is not displayed in the multifunction display. X Have the faulty tyre pressure sensor replaced at a qualified spe-

cialist workshop.

The wheels fitted do not have a suitable tyre pressure sensor. The tyre pressure monitor is deactivated. X Fit wheels with suitable tyre pressure sensors.

The tyre pressure monitor is activated automatically after driv- ing for a few minutes.

The tyre pressure monitor is faulty. X Visit a qualified specialist workshop.

Vehicle (4-button multifunction steering wheel) Display messages To start engine, shift to P or N

Possible causes/consequences and M Solutions You have attempted to start the engine with the transmission in position R or D. X Shift the transmission to position P or N.

Select Park (P)

You have switched off the engine with the Start/Stop button and opened the driver's door. You wanted to lock the vehicle. A warning tone also sounds. or You have switched off the engine with the Start/Stop button and opened the driver's door with the transmission in position N. X Shift the transmission to position P.

274 Display messages

Display messages

Possible causes/consequences and M Solutions With the Hold function activated, you have either: Ropened the driver's door and released the seat belt or Rswitched off the engine or Ropened the bonnet. A tone may also sound at regular intervals. If you attempt to lock the vehicle, the tone becomes louder. You cannot start the engine. X Shift the transmission to position P.

You can restart the engine.

N The boot lid is open. X Close the boot lid.

M Vehicles with an anti-theft alarm system: the bonnet is open. A

warning tone also sounds. G WARNING The open bonnet may then block your view when the vehicle is in motion. There is a risk of an accident. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Secure the vehicle against rolling away (Y page 169). X Close the bonnet.

C At least one door is open. A warning tone also sounds.

X Close all doors.

The driver's or front-passenger seat backrest is not engaged. A warning tone also sounds. X Push the backrest back until it engages.

Front left seat backr. not locked  or Front right seat backr. not locked

Display messages Check trailer hitch lock

Pwr. steering Malfunction

Display messages

275

Possible causes/consequences and M Solutions Vehicles with a retractable trailer coupling: The trailer tow hitch is not correctly engaged. A warning tone also sounds. 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 169). X Engage the trailer coupling's ball coupling in the end position

(Y page 211).

The power steering assistance is faulty. A warning tone also sounds. G WARNING You will need to use more force to steer. There is a risk of an accident. X Check whether you are able to apply the extra force required. X If you are able to steer safely: carefully drive on to a qualified

specialist workshop.

X If you are unable to steer safely: do not drive on. Contact the

nearest qualified specialist workshop.

Top up washer fluid

The washer fluid level in the washer fluid reservoir has dropped below the minimum. X Top up the washer fluid (Y page 318).