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Malfunction Service Required or Front Right Malfunction Service Required
Rear Left Malfunction Service Required or Rear Right Malfunction Service Required
Rear Center Malfunction Service Required
Left Side Curtain Airbag Malfunction Service Required or Right Side Curtain Airbag Malfunction Service Required
Possible causes/consequences and M Solutions 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 a qualified specialist workshop. SRS has malfunctioned at the rear center. 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. 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.Lights i Display messages about LEDs:
Display messages
209
Possible causes/consequences and M Solutions The left or right-hand cornering light is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
This display message will only appear if all LEDs have failed. Display messages Check Left Cornering Light or Check Right Cornering Light Check Left Low Beam or Check Right Low Beam
or X Visit a qualified specialist workshop.
or X Visit a qualified specialist workshop.
(Y page 104).
The left or right-hand low-beam headlamp is defective. X Check whether you are permitted to replace the bulb yourself
Check Rear Left Turn Signal or Check Rear Right Turn Signal 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
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 104).
or X Visit a qualified specialist workshop.
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 104).
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 104).
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 104).
or X Visit a qualified specialist workshop.
210 Display messages
Display messages 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
License Plate Lamp
Check Left Fog Lamp or Check Right Fog Lamp
Rear Fog Lamp
Check Front Left Parking Lamp or Check Front Right Parking Lamp
Possible causes/consequences and M Solutions The left or right-hand brake lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
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 104).
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 104).
or X Visit a qualified specialist workshop.
The left or right-hand license plate lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
or X Visit a qualified specialist workshop.
The left-hand or right-hand front fog lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
or X Visit a qualified specialist workshop.
The rear fog lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
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 104).
or X Visit a qualified specialist workshop.
Display messages Backup Light
Check Left Tail Lamp or Check Right Tail Lamp
Check Front Left Sidemarker Lamp or Check Front Right Sidemarker Lamp Check Rear Left Sidemarker Lamp or Check Rear Right Sidemarker Lamp Check Left Daytime Running Light or Check Right Daytime Running Light Active Light System Inoperative Malfunction See Operator's Manual Auto Lamp Function Inoperative
Display messages
211
Possible causes/consequences and M Solutions The backup lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
or X Visit a qualified specialist workshop.
The left or right-hand tail lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
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 104).
or X Visit a qualified specialist workshop.
The rear left or right side marker lamp is defective. X Check whether you are permitted to replace the bulb yourself
(Y page 104).
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 104).
or X Visit a qualified specialist workshop.
The active light function is defective. X Visit a qualified specialist workshop.
The exterior lighting is defective. X Visit a qualified specialist workshop.
The light sensor is defective. X Visit a qualified specialist workshop.
212 Display messages
Display messages Switch Off Lights Adaptive Highbeam Assist Inoperative Adaptive Highbeam Assist Currently Unavailable See Operator's Manual
Engine Display messages Check Coolant Level See Operator'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 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.
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 Add coolant, observing the warning notes before doing so
(Y page 269).
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.
Display messages
213
Display messages Coolant Too Hot Stop Vehicle Turn Engine Off
Possible causes/consequences and M Solutions 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 149). 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 †).
# 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 immediately.
214 Display messages
Display messages Check Engine Oil At Next Refueling
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 refueling, at the latest
(Y page 267).
X If necessary, add engine oil (Y page 268). 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 (USA only).
æ Fuel Level Low ç There is only a very small amount of fuel in the fuel tank.
The fuel level has dropped into the reserve range. X Refuel at the nearest gas station.
æ Gas Cap Loose
X Refuel at the nearest gas station without fail. 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.
Display messages
215
Driving systems Display messages À Attention Assist: Take a Break!
À Attention Assist Inoperative ë Off
Radar Sensor Deactivated See Operator's Manual Lane Keeping Assist Currently Unavailable See Operator's Manual
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 you get enough rest.
ATTENTION ASSIST is inoperative. X Visit a qualified specialist workshop.
The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. X Reactivate the HOLD function later (Y page 167).
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 167).
The radar sensor system is deactivated. X Switch on the radar sensor system (Y page 199).
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 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 149). X Clean the windshield.
216 Display messages
Display messages Lane Keeping Assist Inoperative Blind Spot Assist Currently Unavailable See Operator's ManualBlind Spot Assist Currently Unavailable See Operator's Manual
Blind Spot Assist Inoperative
Park Assist Canceled
Possible causes/consequences and M Solutions Lane Keeping Assist is faulty. X Visit a qualified specialist workshop. 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 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 149). X Clean the sensors (Y page 275). X Restart the engine.
Blind Spot Assist is defective. The yellow 9 indicator lamps also light up in the exterior mirrors. X Visit a qualified specialist workshop. The driver's door is open and the driver's seat belt has not been fastened. X Repeat the parking process with the seat belt fastened and the
driver's door closed.
You 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 172).
Display messages
217
Display messages Park Assist Inoperative
Possible causes/consequences and M Solutions 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 172). 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.
deactivated automatically, a warning tone also sounds.
DISTRONIC PLUS Off DISTRONIC PLUS has been deactivated (Y page 159). If it was DISTRONIC PLUS Now Available DISTRONIC PLUS Currently Unavailable See Operator's Manual
DISTRONIC PLUS is operational again after having been temporarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 159). DISTRONIC PLUS is temporarily inoperative. Possible causes are: Rfunction is impaired due to heavy rain or snow. Rthe sensors in the radiator trim 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 149). X Clean the sensors in the radiator trim (Y page 275). X Restart the engine.
218 Display messages
Display messages DISTRONIC PLUS Inoperative
DISTRONIC PLUS Passive
DISTRONIC PLUS --- mph
Cruise Control Inoperative
Cruise Control --- mph
Possible causes/consequences and M Solutions DISTRONIC PLUS is defective. Adaptive Brake Assist 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 161).
Cruise control is defective. A warning tone also sounds. X Visit a qualified specialist workshop.
A condition for activating cruise control has not been fulfilled. 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 158).
Display messages
219
Tires Display messages Check Tire Pressure Soon
Check Tire Pressure Then Restart Run Flat Indicator
Run Flat Indicator Inoperative
Possible causes/consequences and M Solutions 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 149). X If there is a flat tire, inspect the tires (Y page 281). 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 305).
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 305). The tire pressure loss warning system is faulty. X Visit a qualified specialist workshop.
220 Display messages
Vehicle Display messages Shift to 'P' or 'N' to Start Engine
Auxiliary Battery Malfunction
Depress Brake to Start Engine
To Deselect P or N, Depress Brake and Start Engine
Apply Brake to Shift from 'P'
Transmission Not in P Risk of Vehicle Rolling Away
Possible causes/consequences and M Solutions You have attempted to start the engine with the transmission in position R or D. X Shift the transmission to position P or N.
The auxiliary battery for the automatic transmission is no longer being charged. X Visit a qualified specialist workshop at the next opportunity. X Until then, set the automatic transmission to position P before
you switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. You have attempted to start the engine with the transmission in position N without depressing the brake pedal. X Depress the brake pedal. You have attempted to shift the transmission to position R or D without starting the engine. X Start the engine. X Depress the brake pedal. i It is only possible to shift the transmission from position P to the desired position if you depress the brake pedal. Only then can the parking lock be deactivated. If you do not depress the brake pedal, you can move the DIRECT SELECT lever but the parking lock remains engaged.
i At transmission fluid temperatures below Ò4 ‡ (Ò20 †) you
can only shift out of position P into another transmission position when the engine is running.
You have attempted to move the transmission selector lever to position R, N or D without depressing the brake pedal. X Depress the brake pedal. The driver's door is open and the transmission is in position R, N or D. A warning tone also sounds. X Shift the transmission to position P. X Secure the vehicle against rolling away (Y page 149).
Display messages
221
Display messages Service Required Do Not Shift Gears Visit Dealer
Possible causes/consequences and M Solutions You cannot change the transmission position due to a malfunction. A warning tone also sounds. If transmission position D is selected: X Drive to a qualified specialist workshop without shifting the
transmission from position D.
Only Shift to 'P' when Vehicle is Stationary Reversing Not Possible Service Required Transmission Malfunction Transmission Malfunction Stop
Stop Vehicle Shift to P Leave Engine Running
If transmission position R, N or P is selected: X Notify a qualified specialist workshop or breakdown service. The vehicle is moving. X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the transmission to position P. The automatic transmission is malfunctioning. You cannot back up. X Visit a qualified specialist workshop. The automatic transmission is malfunctioning. X Visit a qualified specialist workshop. The automatic transmission is malfunctioning. 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 149). X Consult a qualified specialist workshop. The automatic transmission has overheated. X Drive on carefully.
The automatic transmission is available again when the display message goes out.
If the display message continues to be displayed: 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 149). X Wait until the automatic transmission has cooled down and the
display message has disappeared.
222 Display messages
Display messages A The tailgate is open.
Possible causes/consequences and M Solutions
G WARNING When the engine is running, exhaust gases can enter the vehicle interior if the tailgate is open. There is a risk of poisoning. X Close the tailgate.
? The hood is open. G WARNING The open hood may 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 Apply the electric parking brake. X Close the hood.
C At least one door is open. A warning tone also sounds.
X Close all the doors.
Ð Power Steering Malfunction See Operator's Manual
The power steering is malfunctioning. 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.
Phone No Service
Your vehicle is outside the network provider's transmitter/ receiver range. X Wait until the mobile phone operational readiness symbol
appears in the multifunction display.
Display messages
223
Display messages ¥ Check Washer Fluid
Possible causes/consequences and M Solutions The washer fluid level in the washer fluid reservoir has dropped below the minimum. i If you do not mix antifreeze with the washer fluid in the winter months, then the washer fluid could freeze in the washer fluid reservoir. In this case the Check Washer Fluid display message could also be shown in the multifunction display.
Wiper Malfunctioning Hazard Warning Flashers Malfunctioning
SmartKey Display messages Key Does Not Belong to Vehicle Take Your Key from Ignition Obtain a New Key
X Add washer fluid (Y page 269).
The windshield wipers are malfunctioning. X Visit a qualified specialist workshop.
The hazard warning lamps are faulty. X Visit a qualified specialist workshop.
Possible causes/consequences and M Solutions You have put the wrong SmartKey in the ignition lock. X Use the correct SmartKey.
The SmartKey is in the ignition lock. X Remove the SmartKey.
The SmartKey needs to be replaced. X Visit a qualified specialist workshop.
ü After starting the engine, the red seat belt warning lamp lights up for six seconds.
ü After starting the engine, the red seat belt warning lamp lights up. In addition, a warning tone sounds for up to six seconds.
ü The red seat belt warning lamp lights up after the engine starts, as soon as the driver's or the front-passenger door is closed.
224 Warning and indicator lamps in the instrument cluster
Warning and indicator lamps in the instrument cluster Seat belts Problem
Possible causes/consequences and M Solutions The seat belt warning lamp reminds the driver and front passenger to fasten their seat belts. X Fasten your seat belt (Y page 45).
The driver's seat belt is not fastened. X Fasten your seat belt (Y page 45).
The warning tone ceases.
The driver or front passenger has not fastened their seat belt. X Fasten your seat belt (Y page 45).
The warning lamp goes out.
There are objects on the front-passenger seat. X Remove the objects from the front-passenger seat and stow
them in a secure place. The warning lamp goes out.
ü The red seat belt warning lamp flashes and an intermittent audible warning sounds.
The driver or front passenger has not fastened their seat belt. In addition, you are driving faster than 15 mph (25 km/h) or you have briefly driven faster than 15 mph (25 km/h). X Fasten your seat belt (Y page 45).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. In addition, you are driving faster than 15 mph (25 km/h) or you have briefly driven faster than 15 mph (25 km/h). X Remove the objects from the front-passenger seat and stow
them in a secure place. The warning lamp goes out and the intermittent warning tone ceases.
Warning and indicator lamps in the instrument cluster
225
Safety systems Problem $ (USA only) J (Canada only) The red brake system warning lamp comes on while the engine is running. A warning tone also sounds.
The yellow ABS warning lamp is lit while the engine is running.
Possible causes/consequences and M Solutions There is not enough brake fluid in the brake fluid reservoir. 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 149). X Do not add brake fluid. Adding more will not remedy the
malfunction.
X Consult a qualified specialist workshop. X Observe the additional display messages in the multifunction
display.
ABS (Anti-lock Braking System) is deactivated due to a malfunction. BAS (Brake Assist), COLLISION PREVENTION ASSIST, ESP® (Electronic Stability Program), the HOLD function and hill start assist are therefore also deactivated, for example. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affected. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilize the vehicle. There is an increased risk of skidding and an accident. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop. If the ABS control unit is faulty, there is also a possibility that other systems, such as the navigation system or the automatic transmission, will not be available.
226 Warning and indicator lamps in the instrument cluster
Problem
The yellow ABS warning lamp is lit while the engine is running.
Possible causes/consequences and M Solutions ABS is temporarily unavailable. BAS, COLLISION PREVENTION ASSIST, ESP®, EBD (electronic brake force distribution), the HOLD function and hill start assist are therefore also deactivated, for example. Possible causes are: RSelf-diagnosis is not yet complete. RThe on-board voltage may be insufficient. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The front and rear wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affected. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilize the vehicle. There is a risk of an accident. X Carefully drive on a suitable stretch of road, making slight steering movements at a speed above 12 mph (20 km/h). The functions mentioned above are available again when the warning lamp goes out.
If the warning lamp is still on: X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
227
Problem
The yellow ABS warning lamp is lit while the engine is running. A warning tone also sounds.
$ (USA only) J (Canada only) ÷å! The red brake warning lamp, the yellow ESP® and ESP® OFF warning lamps and the yellow ABS warning lamp are lit while the engine is running.
Possible causes/consequences and M Solutions EBD is malfunctioning. Therefore, ABS, BAS, COLLISION PREVENTION ASSIST, ESP®, the HOLD function and hill start assist are unavailable, for example. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The front and rear wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affected. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilize the vehicle. There is an increased risk of skidding and an accident. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
ABS and ESP® are malfunctioning. Therefore, BAS, COLLISION PREVENTION ASSIST, EBD, the HOLD function and hill start assist are also unavailable, for example. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The front and rear wheels could therefore lock if you brake hard, for example. The steerability and braking characteristics may be severely affected. The braking distance in an emergency braking situation can increase. If ESP® is not operational, ESP® is unable to stabilize the vehicle. There is an increased risk of skidding and an accident. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
228 Warning and indicator lamps in the instrument cluster
Problem
÷ The yellow ESP® warning lamp flashes while the vehicle is in motion.
å The yellow ESP® OFF warning lamp is lit while the engine is running.
÷å The yellow ESP® and ESP® OFF warning lamps are lit while the engine is running.
Possible causes/consequences and M Solutions ESP® or traction control has intervened because there is a risk of skidding or at least one wheel has started to spin. Cruise control or DISTRONIC PLUS is deactivated. X When pulling away, only depress the accelerator pedal as far as
necessary.
X Ease off the accelerator pedal while the vehicle is in motion. X Adapt your driving style to suit the road and weather conditions. X Do not deactivate ESP®.
For exceptions, see: (Y page 62).
ESP® and ESP® trailer stabilization are deactivated. ESP® will not stabilize the vehicle if it starts to skid or if a wheel starts to spin. G WARNING If ESP® is switched off, ESP® is unable to stabilize the vehicle. There is an increased risk of skidding and an accident. X Reactivate ESP®.
For exceptions, see: (Y page 62).
X Adapt your driving style to suit the road and weather conditions. If ESP® cannot be activated: X Have ESP® checked at a qualified specialist workshop.
ESP®, BAS, COLLISION PREVENTION ASSIST, the HOLD function and hill start assist are unavailable due to a malfunction. ATTENTION ASSIST is deactivated. G WARNING The brake system continues to function normally, but without the functions listed above. The braking distance in an emergency braking situation can thus increase. If ESP® is not operational, ESP® is unable to stabilize the vehicle. There is an increased risk of skidding and an accident. X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
229
Problem
÷å The yellow ESP® and ESP® OFF warning lamps are lit while the engine is running.
Possible causes/consequences and M Solutions ESP®, BAS, the HOLD function and hill start assist are temporarily unavailable. COLLISION PREVENTION ASSIST may also have failed. ATTENTION ASSIST is deactivated. Self-diagnosis is not yet complete. G WARNING The brake system continues to function normally, but without the functions listed above. The braking distance in an emergency braking situation can thus increase. If ESP® is not operational, ESP® is unable to stabilize the vehicle. There is an increased risk of skidding and an accident. X Carefully drive on a suitable stretch of road, making slight steering movements at a speed above 12 mph (20 km/h). The functions mentioned above are available again when the warning lamp goes out.
If the warning lamp is still on: X Observe the additional display messages in the multifunction
display.
X Drive on carefully. X Visit a qualified specialist workshop.
230 Warning and indicator lamps in the instrument cluster
Problem F (USA only) ! (Canada only) The red indicator lamp for the electric parking brake flashes or lights up and/or the yellow warning lamp for the electric parking brake lights up.
The red SRS warning lamp is lit while the engine is running.
Possible causes/consequences and M Solutions X Observe the additional display messages in the multifunction
display.
There is a malfunction in the SRS (Supplemental Restraint System). 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 Drive on carefully. X Have SRS checked at a qualified specialist workshop
immediately.
For further information about SRS, see (Y page 38).
Warning and indicator lamps in the instrument cluster
231
Engine Problem
The yellow Check Engine warning lamp lights up while the engine is running.
æ The yellow reserve fuel warning lamp lights up while the engine is running.
æ The yellow reserve fuel warning lamp flashes while the engine is running.
The red coolant warning lamp lights up while the engine is running and the coolant temperature gage is at the start of the scale.
Possible causes/consequences and M Solutions There may be a malfunction, for example: Rin the engine management Rin the fuel injection system Rin the exhaust system Rin the ignition system Rin the fuel system The emission limit values may be exceeded and the engine may be running in emergency mode. X Have the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you must immediately visit a qualified
specialist workshop as soon as the yellow Check Engine warning lamp lights up. This depends on the locally applicable legal requirements. If in doubt, check whether such legal regulations apply in the state in which you are currently driving.
The fuel level has dropped into the reserve range. X Refuel at the nearest gas station.
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. X If the fuel filler cap is not correctly closed: close the fuel filler
X If the fuel filler cap is closed: visit a qualified specialist
cap.
workshop.
The temperature sensor for the coolant temperature gage is defective. The coolant temperature is no longer being monitored. There is a risk of engine damage if the coolant temperature is too high. X Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions. Do not continue driving under any circumstances.
X Secure the vehicle against rolling away (Y page 149). X Consult a qualified specialist workshop.
232 Warning and indicator lamps in the instrument cluster
Problem
The red coolant warning lamp comes on while the engine is running.
The red coolant warning lamp comes on while the engine is running. A warning tone also sounds.
Possible causes/consequences and M Solutions The coolant level is too low. If the coolant level is correct, the airflow to the engine radiator may be blocked or the electric engine radiator fan may be malfunctioning. The coolant is too hot and the engine is no longer being cooled sufficiently. X Observe the additional display messages in the multifunction
display.
X 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 149). X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant (Y page 269). Observe
the warning notes.
X If you need to add coolant more often than usual, have the
engine coolant system checked.
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 coolant temperature is under 248 ‡ (120 †). Otherwise, the engine could be damaged.
X 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.
The coolant temperature has exceeded 248 ‡ (120 †). The airflow to the engine radiator may be blocked or the coolant level may be too low. G WARNING The engine is not being cooled sufficiently and may be damaged. Do not drive when your engine is overheated. This can cause some fluids which may have leaked into the engine compartment to catch fire. Vapor from the overheated engine can also cause serious burns which can occur just by opening the hood. There is a risk of injury. X Observe the additional display messages in the multifunction
display.
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 149).
Warning and indicator lamps in the instrument cluster
233
Problem
Possible causes/consequences and M Solutions X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant (Y page 269). Observe
the warning notes.
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X At coolant temperatures under 248 ‡ (120 †), drive to the next
qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
Driving systems Problem
· The red distance warning lamp lights up while the vehicle is in motion. A warning tone also sounds.
Possible causes/consequences and M Solutions You are approaching a vehicle or a stationary obstacle in your line of travel at too high a speed. X Be prepared to brake immediately. X Pay careful attention to the traffic situation. You may have to
brake or take evasive action.
234
Useful information ............................ 236
Loading guidelines ............................ 236
Stowage areas .................................. 237
Features ............................................. 247235
236 Loading guidelines
