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Check Brake Fluid Level
Check Brake Pad Wear mbrace Inoperative
There is not enough brake fluid in the brake fluid reservoir. In addition, the $ (USA only)/J (Canada only) warning lamp lights up in the instrument cluster and a warning tone sounds.
G WARNING
The braking effect 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 183).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction.
The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop.
USA only: one or more of the main functions in the mbrace system are malfunctioning.
Canada only: one or more of the main functions of the TELEAID system are malfunctioning.
X USA only: have the mbrace system checked at a qualified
specialist workshop.
X Canada only: have the TELEAID system checked at a qualified
specialist workshop.
PRE-SAFE Inoperative See Operator's Manual
Important functions of PRE-SAFE® have failed. All other occupant safety systems, e.g. air bags, remain available.
X Visit a qualified specialist workshop immediately.
294 Display messages
Display messages
Possible causes/consequences and M Solutions
PRE-SAFE
Functions Currently Limited See Operator's Manual
Vehicles without the Active Driving Assistance package: Adaptive Brake Assist is temporarily inoperative. Possible causes are:
Rfunction is impaired due to heavy rain or snow.
Rthe sensor in the bumper is dirty.
Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations 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.
When the causes stated above no longer apply, the display message disappears.
Adaptive Brake 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 183).
X Clean the bumpers (Y page 375).
X Restart the engine.
X AMG vehicles: reactivate ESP®(Y page 72).
Display messages
295
Display messages
Possible causes/consequences and M Solutions
PRE-SAFE
Functions Currently Limited See Operator's Manual
PRE-SAFE
Functions Limited See Operator's Manual
SRS Malfunction Service Required
Vehicles with the Active Driving Assistance package: PRE-SAFE® Brake is temporarily inoperative. Possible causes are:
Rfunction is impaired due to heavy rain or snow.
Rthe sensors in the radiator grill and the bumper are dirty.
Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations 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.
When the causes stated above no longer apply, the display message disappears.
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 183).
X Clean the sensors in the radiator grill and the bumper
(Y page 375).
X Restart the engine.
X AMG vehicles: reactivate ESP®(Y page 72).
Vehicles without the Active Driving Assistance package: Adaptive Brake Assist is faulty. The distance warning function may also have failed.
Vehicles with the Active Driving Assistance package: PRE-SAFE® Brake is faulty. BAS PLUS or the distance warning function may also have failed.
X Visit a qualified specialist workshop.
There is a malfunction in the SRS (Supplemental Restraint System). The 6 warning lamp also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
Further information on occupant safety (Y page 43).
296 Display messages
Display messages
Possible causes/consequences and M Solutions
Front Left Malfunction Service Required or Front Right Malfunction Service Required
Rear Left SRS Malfunction Service Required or Rear Right SRS Malfunction Service Required
Rear Center SRS Malfunction Service Required
Left Side Curtain Airbag Malfunction Service Required or Right Side Curtain Airbag Malfunction Service Required
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 air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
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 air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit aqualified specialist workshop.
SRS has malfunctioned at the rear center. The6 warning lamp also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
There is a malfunction in the left-hand or right-hand window curtain air bag. The 6 warning lamp also lights up in the instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
Display messages
297
Display messages
Possible causes/consequences and M Solutions
Front Passenger Airbag Enabled See Operator's Manual
The front-passenger air bag is enabled during the journey, even though:
Ra child, a small adult or an object weighing less than the
system's weight threshold is located on the front-passenger seat
or
Rthe front-passenger seat is unoccupied
The system may detect objects or forces applying additional weight on the seat.
G WARNING
The air bag may deploy unintentionally.
There is an increased risk of injury.
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 183).
X Switch the ignition off.
X Open the front-passenger door.
X Remove the child and the child restraint system from the front-
passenger seat.
X Make sure that there are no objects on the seat adding to the
weight. The system may otherwise detect the additional weight and interpret the seat occupant's weight as greater than it actually is.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the^a indicator lamp in the center console and
the multifunction display and check the following:
Seat unoccupied and ignition switched on:
Rthe^a indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Occupant Classification System) has disabled the front-passenger air bag (Y page 48).
Rthe Front Passenger Airbag Enabled See Operator's
Manual or Front Passenger Airbag Disabled See Operator's Manual display messages must not be shown in the multifunction display.
X Wait for a period of at least 60 seconds until the necessary
system checks have been completed.
X Make sure that the display messages do not appear in the
multifunction display.
298 Display messages
Display messages
Possible causes/consequences and M Solutions
Front Passenger Airbag Disabled See Operator's Manual
If these conditions are fulfilled, the front-passenger seat can be occupied again. Whether the^a indicator lamp remains lit or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating correctly.
X Visit a qualified specialist workshop immediately.
The front-passenger air bag is disabled during the journey, even though:
Ran adult
or
Ra person larger than a certain size is occupying the front-
passenger seat
If additional forces are applied to the seat, the system may interpret the occupant's weight as lower than it actually is.
G WARNING
The front-passenger air bag does not deploy during an accident.
There is an increased risk of injury.
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 183).
X Switch the ignition off.
X Have the occupant get out of the vehicle.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the^a indicator lamp in the center console and
the multifunction display and check the following:
Seat unoccupied and ignition switched on:
Rthe^a indicator lamp must light up and remain lit. When the indicator lamp is on, OCS has disabled the front-passenger air bag (Y page 48).
Rthe Front Passenger Airbag Enabled See Operator's
Manual or Front Passenger Airbag Disabled See Operator's Manual display messages must not be shown in the multifunction display.
X Wait for a period of at least 60 seconds until the necessary
system checks have been completed.
X Make sure that the display messages do not appear in the
multifunction display.
Display messages
299
Display messages
Possible causes/consequences and M Solutions
If these conditions are fulfilled, the front-passenger seat can be occupied again. Whether the^a indicator lamp remains lit or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating correctly.
X Visit a qualified specialist workshop immediately.
Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed.
Display messages
Possible causes/consequences and M Solutions
Check Left
Cornering Light or Check Right Cornering Light
Check Left Low Beam or Check Right Low Beam
Check Trailer Left Turn Signal or Check Trailer Right Turn Signal Check Rear Left Turn Signal or Check Rear Right Turn Signal
The left or right-hand cornering light is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right-hand low-beam headlamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right-hand trailer turn signal lamp is defective.
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 defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
300 Display messages
Display messages
Possible causes/consequences and M Solutions
Check Front Left Turn Signal or Check Front Right Turn Signal Check Left Mirror Turn Signal or Check Right Mirror Turn Signal
Check Center Brake Lamp
Check Left Brake Lamp or Check Right Brake Lamp
Check Left Tail and Brake Lamps or Check Right Tail and Brake Lamps
Check Left High Beam or Check Right High Beam
The front left-hand or front right-hand turn signal is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The turn signal in the left-hand or right-hand exterior mirror is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The high-mounted brake lamp is faulty.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right-hand brake lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right-hand tail lamp/brake lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right-hand high beam is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
Display messages
301
Display messages
Possible causes/consequences and M Solutions
License Plate Lamp
Check Front Left Parking Lamp or Check Front Right Parking Lamp
Backup Light
Check Front Left Sidemarker Lamp or Check Front Right Sidemarker Lamp Check Left Tail Lamp or Check Right Tail Lamp
Check Left Daytime Running Light or Check Right Daytime Running Light
The left or right-hand license plate lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The front left or front right parking or standing lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The backup lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right front side marker lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left or right-hand tail lamp is defective.
or
The rear left or right side marker lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
The left-hand or right-hand daytime running lamp is faulty.
X Check whether you are permitted to replace the bulb yourself
(Y page 133).
or
X Visit a qualified specialist workshop.
302 Display messages
Display messages
Possible causes/consequences and M Solutions
Active Headlamps Inoperative Malfunction See Operator's Manual
Auto Lamp Function Inoperative Switch Off Lights
The active light function is defective.
X Visit aqualified specialist workshop.
The exterior lighting is defective.
X Visit a qualified specialist workshop.
Vehicles with trailer tow hitch: a fuse may have blown.
X Check the fuses (Y page 396).
X If necessary, replace the blown fuse. Observe the warning notes.
If the display message continues to be displayed:
X Visit a qualified specialist workshop.
The light sensor is defective.
X Visit a qualified specialist workshop.
The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to Ã.
Adaptive Highbeam Assist Inoperative
Adaptive Highbeam Assist is faulty.
X Visit a qualified specialist workshop.
Adaptive Highbeam Assist Currently Unavailable See Operator's Manual
Adaptive Highbeam Assist is deactivated and temporarily inoperative. Possible causes are:
Rthe windshield in the camera's field of vision is dirty.
Rvisibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational again, the Adaptive Highbeam Assist Now Available message is displayed.
Adaptive Highbeam Assist is operational again.
Display messages
303
Engine
Display messages
Possible causes/consequences and M Solutions
Check Coolant Level See Operator's Manual
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 Add coolant, observing the warning notes before doing so
(Y page 369).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist workshop.
? The fan motor is faulty.
X At coolant temperatures below 248 ‡ (120 †) drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
Coolant Too Hot Stop Vehicle Turn Engine Off
The coolant is too hot.
A warning tone also sounds.
G WARNING
Do not drive when your engine is overheated. This can cause some fluids which may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur just by opening the hood.
There is a risk of injury.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 183).
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 snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †). Otherwise, the engine could 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 248 ‡ (120 †).
304 Display messages
Display messages
Possible causes/consequences and M Solutions
# The battery is not being charged.
A warning tone also sounds.
Possible causes are:
Ra defective alternator
Ra torn poly-V-belt
Ra malfunction in the electronics
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Open the hood.
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 not damaged:
X Visit a qualified specialist workshop.
The engine oil level has dropped to the minimum level.
A warning tone also sounds.
X Check the oil level when next refueling, at the latest
(Y page 368).
X If necessary, add engine oil (Y page 368).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http:// bevo.mercedes-benz.com.
Check Engine Oil At Next Refueling
Display messages
305
Display messages
Possible causes/consequences and M Solutions
Check Engine Oil Level (Add 1 quart)
AMG vehicles: the engine oil level is too low.
X Check the oil level when next refueling, at the latest
(Y page 368).
X If necessary, add engine oil (Y page 368).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http:// bevo.mercedes-benz.com.
The fuel level has dropped into the reserve range.
Fuel Level Low C There is only a very small amount of fuel in the fuel tank.
X Refuel at the nearest gas station.
X Refuel at the nearest gas station without fail.
Gas Cap Loose
The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
X Close the fuel filler cap.
If the fuel filler cap is correctly closed:
X Visit a qualified specialist workshop.
Ultra Low-sulfur Diesel Fuel Only
¸ Replace Air Filter
Check Fuel Filter
Vehicles with a diesel engine: the fuel level has fallen below the reserve range.
X Refuel at the nearest gas station.
X Only use commercially available vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (ULSD, 15ppm SULFUR MAXIMUM).
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.
306 Display messages
Display messages
Possible causes/consequences and M Solutions
Ø Check Additive See Operator's Manual Ø Remaining Starts: 16
The DEF tank is almost empty.
X Have the DEF tank filled as soon as possible at a qualified
specialist workshop (Y page 181).
The DEF level has fallen to a minimum. You can start the engine a further 16 times.
X Have the DEF tank filled immediately at a qualified specialist
workshop (Y page 181).
i You can start the engine a further 16 times. If DEF is not added, it will then not be possible to restart the engine. Refill the DEF tank with approximately 1 gal (3.8 l) DEF (Y page 181).
Driving systems
Display messages
Possible causes/consequences and M Solutions
À Attention Assist: Take a Break!
À Attention Assist Inoperative Á Drive More Slowly
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 you get enough rest.
ATTENTION ASSIST is inoperative.
X Visit aqualified specialist workshop.
You cannot change the vehicle level. Possible causes are:
Ryou are driving too fast for the selected vehicle level.
Ryou are towing a trailer.
Rthe trailer-coupling socket is being used, e.g. for a bicycle rack.
X Drive more slowly and then select the desired vehicle level
again.
RVehicles with the ON&OFFROAD package (Y page 207)
RVehicles with the AIRMATIC package (Y page 213)
X Observe the notes on towing a trailer (Y page 257).
Display messages
307
Display messages
Possible causes/consequences and M Solutions
Á Compressor Is Cooling
Á Malfunction
You have selected a higher vehicle level. The compressor first needs to cool down because of frequent level changes.
X Drive in a manner appropriate for the current vehicle level.
X Make sure that there is sufficient ground clearance.
X Allow the compressor to cool down.
When the compressor has cooled down, the display message disappears. The vehicle then continues rising to the selected level.
AIRMATIC is malfunctioning.
X Drive in a manner appropriate for the current vehicle level, but
no faster than 50 mph (80 km/h).
X Make sure that there is sufficient ground clearance.
X Have the vehicle checked at a qualified specialist workshop.
Á Max. Speed 12 mph
You are exceeding the speed permissible for the selected off-road level.
In addition, the vehicle level display appears between the vehicle icon and the display message, and a warning tone sounds.
G WARNING
The vehicle could tip and rollover.
There is a risk of an accident.
X Adjust your driving style to the altered handling characteristics.
X Only make slight steering movements and avoid fast steering
movements.
X Do not drive faster than 12 mph (20 km/h) until off-road level 2
has been reached.
ACTIVE CURVE SYSTEM Malfunctioning
The Active Curve System is faulty. The vehicle's handling characteristics may be affected.
X Do not drive faster than 50 mph (80 km/h).
X Have the vehicle checked at a qualified specialist workshop.
308 Display messages
Display messages
Possible causes/consequences and M Solutions
ACTIVE CURVE SYSTEM Malfunction See Operator's Manual
Lowering Max. Speed 12 mph
Different. Lock Sys. Malfunction Different. Locking Sys. Cooling Down Please Wait
LOW RANGE Stop Apply Parking Brake
LOW RANGE Malfunction To Park, Apply Brake
The Active Curve System is faulty. The vehicle's handling characteristics are severely impaired. A warning tone also sounds.
G WARNING
There is a risk of an accident.
X Drive on carefully.
X Adjust your driving style to the altered handling characteristics.
X Avoid sudden acceleration in tight bends and fast steering
movements.
X Do not drive faster than 50 mph (80km/h).
X Visit a qualified specialist workshop immediately.
The vehicle is being lowered from off-road level 3 to off-road level 2. The display message informs you of the maximum speed permissible for off-road level 3.
X Do not drive faster than 12 mph (20 km/h) until off-road level 2
has been reached.
The differential lock is malfunctioning.
X Do not drive faster than 50 mph (80km/h).
X Have the vehicle checked at a qualified specialist workshop.
The differential lock is too hot and has been disengaged.
X Drive on carefully.
X Allow the differential lock to cool down.
The differential lock reengages as soon as it has cooled down.
A gearshift process has been canceled. LOW RANGE is in the neutral position. There is no connection between the engine and the drive wheels.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Apply the electric parking brake. Do not continue driving under
any circumstances.
X Repeat the gearshift process.
LOW RANGE is malfunctioning.
X Do not drive faster than 50 mph (80km/h).
X When parking, secure the vehicle against rolling away
(Y page 183).
X Have the vehicle checked at a qualified specialist workshop.
Display messages
309
Display messages
Possible causes/consequences and M Solutions
LOW RANGE Max. Speed 25 mph
LOW RANGE Max. Speed 40 mph
You have exceeded the maximum speed for the gearshift process.
X Drive more slowly.
The gear change is made.
You have exceeded the maximum speed for the gearshift process.
X Drive more slowly.
The gear change is made.
LOW RANGE Shift to Position N Briefly
You have reduced the vehicle speed, but the automatic transmission is not in position N.
X Briefly shift the automatic transmission to position N.
LOW RANGE Shifting Canceled Please Reactivate à Inoperative
ë Off
The gearshift process has been canceled.
X Repeat the gearshift process.
DSR (Downhill Speed Regulation) is deactivated due to a malfunction.
X Have DSR checked at 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 211).
Radar Sensors Deactivated See Operator's Manual
The radar sensor system is deactivated.
X Switch on the radar sensor system (Y page 281).
310 Display messages
Display messages
Possible causes/consequences and M Solutions
Lane Keeping Assist Currently Unavailable See Operator's Manual or Active Lane Keeping Assist Currently Unavailable See Operator's Manual
Lane Keeping Assist Inoperative or Active Lane Keeping Assist Inoperative
Blind Spot Assist Currently Unavailable See Operator's Manual or Active Blind Spot Assist Currently Unavailable See Operator's Manual
Lane Keeping Assist or Active Lane Keeping Assist is deactivated and temporarily inoperative. Possible causes are:
Rthe windshield in the camera's field of vision is dirty.
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.
When the causes stated above no longer apply, the display message disappears.
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 183).
X Clean the windshield.
Lane Keeping Assist or Active Lane Keeping Assist is defective.
X Visit a qualified specialist workshop.
Blind Spot Assist or Active Blind Spot Assist is temporarily inoperative.
You have established the electrical connection between the trailer and your vehicle. X Press a on the steering wheel to confirm the display
message.
Blind Spot Assist or Active Blind Spot Assist is deactivated while towing a trailer.
Display messages
311
Display messages
Possible causes/consequences and M Solutions
Blind Spot Assist or Active Blind Spot Assist is temporarily inoperative. Possible causes are:
Rthe sensors are dirty.
Rfunction 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 stations or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior mirrors.
When the causes stated above no longer apply, the display message disappears.
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 183).
X Clean the sensors (Y page 375).
X Restart the engine.
Blind Spot Assist Inoperative or Active Blind Spot Assist Inoperative
Blind Spot Assist or Active Blind Spot Assist is defective. The yellow 9 indicator lamps also light up in the exterior mirrors.
X Visit a qualified specialist workshop.
Park Assist Canceled
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 have inadvertently touched the multifunction steering wheel while steering intervention was active.
X While steering intervention is active, make sure that the
multifunction steering wheel is not touched unintentionally.
The vehicle has started to skid and ESP® has intervened.
X Use Active Parking Assist again later (Y page 221).
312 Display messages
Display messages
Possible causes/consequences and M Solutions
Park Assist Inoperative
You have just carried out a large number of turning or parking maneuvers.
Active Parking Assist will become available again after approximately ten minutes (Y page 221).
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 defective.
X Visit a qualified specialist workshop.
Park Assist Finished
The vehicle is parked. A warning tone also sounds.
The display message disappears automatically.
DISTRONIC PLUS Off DISTRONIC PLUS has been deactivated (Y page 198).
If it was deactivated automatically, a warning tone also sounds.
DISTRONIC PLUS Now Available
DISTRONIC PLUS is operational again after having been temporarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 198).
DISTRONIC PLUS Currently Unavailable See Operator's Manual
DISTRONIC PLUS is temporarily inoperative. Possible causes are:
Rfunction is impaired due to heavy rain or snow.
Rthe sensors in the radiator grill and the bumper are dirty.
Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio stations 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.
When the causes stated above no longer apply, the display message disappears.
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 183).
X Clean the sensors in the radiator grill and the bumper
(Y page 375).
X Restart the engine.
Display messages
313
Display messages
Possible causes/consequences and M Solutions
DISTRONIC PLUS Inoperative
DISTRONIC PLUS is defective.
BAS PLUS (Brake Assist PLUS) and PRE-SAFE® Brake may be inoperative as well.
A warning tone also sounds.
X Visit aqualified specialist workshop.
DISTRONIC PLUS Inactive
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.
DISTRONIC PLUS
An activation condition for DISTRONIC PLUS is not fulfilled.
--- mph
X Check the activation conditions for DISTRONIC PLUS
(Y page 198).
Cruise Control Inoperative
Cruise control is defective.
X Visit a qualified specialist workshop.
Cruise Control
A condition for activating cruise control has not been fulfilled.
--- mph
You have tried to store a speed below 20 mph (30 km/h), for example.
X If conditions permit, drive faster than 20 mph (30 km/h) and
store the speed.
X Check the activation conditions for cruise control
(Y page 195).
314 Display messages
Tires
Display messages
Possible causes/consequences and M Solutions
Check Tire Pressure Soon
The tire pressure loss warning system has detected a significant loss in pressure.
A warning tone also sounds.
G WARNING
With tire pressures which are too low, there is a risk of the following hazards:
Rthey may burst, especially as the load and vehicle speed
increase.
Rthey may wear excessively and/or unevenly, which may greatly
impair tire 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 maneuvers. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 183).
X Check the tires and, if necessary, follow the instructions for a
flat tire (Y page 383).
X Check the tire pressures and, if necessary, correct the tire
pressure.
X Restart the tire pressure loss warning system when the tire
pressure is correct (Y page 408).
Check Tire Pressure Then Restart Run Flat Indicator
The tire pressure loss warning system generated a display message and has not been restarted since.
X Set the correct tire pressure in all four tires.
X Restart the tire pressure loss warning system (Y page 408).
Run Flat Indicator Inoperative
The tire pressure loss warning system is faulty.
X Visit a qualified specialist workshop.
Correct Tire Pressure
The tire pressure is too low in at least one of the tires, or the tire pressure difference between the wheels is too great.
X Check the tire pressures at the next opportunity (Y page 408).
X If necessary, correct the tire pressure.
X Restart the tire pressure monitor (Y page 411).
Display messages
315
Display messages
Possible causes/consequences and M Solutions
Check Tires
The tire pressure in one or more tires has dropped significantly. The wheel position is displayed in the multifunction display.
A warning tone also sounds.
G WARNING
With tire pressures which are too low, there is a risk of the following hazards:
Rthey may burst, especially as the load and vehicle speed
increase.
Rthey may wear excessively and/or unevenly, which may greatly
impair tire 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 maneuvers. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 183).
X Check the tires and, if necessary, follow the instructions for a
flat tire (Y page 383).
X Check the tire pressure (Y page 408).
X If necessary, correct the tire pressure.
Warning Tire Malfunction
The tire pressure in one or more tires has dropped suddenly. The wheel position is shown in the multifunction display.
G WARNING
If you drive with a flat tire, there is a risk of the following hazards:
RA flat tire affects the ability to steer or brake the vehicle.
RYou could lose control of the vehicle.
RContinued driving with a flat tire 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 maneuvers. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away (Y page 183).
X Check the tires and, if necessary, follow the instructions for a
flat tire (Y page 383).
316 Display messages
