Mersedes SUV Manuals

Display messages

Mercedes-Benz M-Class / Mercedes-Benz M-Class Owners Manual / On-board computer and displays / Display messages

General notes

All categories of messages contain important information which should be taken WARNING
All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes-Benz Center.

Failure to repair the condition noted may cause damage not covered by the Mercedes-Benz Limited Warranty, or result in property damage or personal injury.

Display messages appear in the multifunction display.

Display messages with graphic displays may be shown in simplified form in the Operator's Manual and may differ from the messages shown in the multifunction display.

Please respond in accordance with the display messages and follow the additional notes in this Operator's Manual.

Certain display messages are accompanied by an audible warning tone or a continuous tone.

When you stop and park the vehicle, please observe the notes on the HOLD function (Y page 179) and parking.

Hiding display messages

You can hide some display messages with a low priority.

You can hide some display messages with a low priority.

Press the button on the steering wheel to or
hide the display message. button on the steering wheel to
hide the display message.

The display message is cleared.

Display messages with a high priority are shown in red.

You cannot hide display messages of the highest priority. The multifunction display shows these messages continuously until the causes for the messages have been remedied.

Message memory

The on-board computer saves certain display messages. You can call up the display messages in the message memory.

Press the button on the steering wheel to or
select the Serv. menu. button on the steering wheel to
select the Serv. menu.

If there are display messages, the multifunction display shows, for example, 2 Messages.

Press the button to select the entry, e.g. 2 or
Messages. button to select the entry, e.g. 2
Messages.

Confirm witha.

Press the button to scroll through the or
display messages. button to scroll through the
display messages.

When the ignition is switched off, all display messages are deleted apart from some highpriority display messages. Once the causes of the high-priority display messages have been rectified, the corresponding display messages are also deleted.

Safety systems













Display messages

Possible causes/consequences and Solutions

Risk of accidentABS (Anti-lock Braking System), ESP (Electronic Stability Program), BAS (Brake Assist), PRE-SAFE, the HOLD Risk of accident

ABS (Anti-lock Braking System), ESP
(Electronic Stability Program), BAS (Brake Assist), PRE-SAFE, the HOLD function, hill start assist and ESP trailer stabilization are temporarily unvailable.

BAS PLUS and PRE-SAFE Brake may also have failed.

In addition, the and,
warning lamps light up in and
the instrument cluster. warning lamps light up in
the instrument cluster.

The self-diagnosis function might not be complete, for example.

ATTENTION ASSIST is deactivated.

The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.

Carefully drive a suitable distance making slight steering movements at a speed above 12 mph (20 km/h).

If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: Drive on carefully.

Visit a qualified specialist workshop.

function, hill start assist and ESP trailer stabilization are Risk of accident

ABS, ESP, BAS, PRE-SAFE, the HOLD
function, hill start assist and ESP trailer stabilization are temporarily unavailable.

BAS PLUS and PRE-SAFE Brake may also have failed.

In addition, the and,
warning lamps light up in and
the instrument cluster. warning lamps light up in
the instrument cluster.

For example, the on-board voltage may be insufficient.

ATTENTION ASSIST is deactivated.

The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.

Drive on carefully.

If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: Drive on carefully.

Visit a qualified specialist workshop.

Risk of accidentABS, ESP, BAS, PRE-SAFE, the HOLD function, hill start assist and ESP trailer stabilization are Risk of accident

ABS, ESP, BAS, PRE-SAFE, the HOLD
function, hill start assist and ESP trailer stabilization are unavailable due to a malfunction.

BAS PLUS and PRE-SAFE Brake may also have failed.

The (Canada only), (USA only)/
, (Canada only),
and,
warning lamps in the and
instrument cluster also light up. warning lamps in the
instrument cluster also light up.

The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.

ATTENTION ASSIST is deactivated.

Drive on carefully.

Visit a qualified specialist workshop immediately.

Risk of accidentESP, BAS, PRE-SAFE, the HOLD function, hill start assist and ESP trailer stabilization are temporarily Risk of accident

ESP, BAS, PRE-SAFE, the HOLD function,
hill start assist and ESP trailer stabilization are temporarily unavailable.

BAS PLUS and PRE-SAFE Brake may also have failed.

In addition, the warning lamps light up in and
the instrument cluster. warning lamps light up in
the instrument cluster.

The self-diagnosis function might not be complete, for example.

ATTENTION ASSIST is deactivated.

The brake system continues to function normally, but without the functions listed above.

Carefully drive a suitable distance making slight steering movements at a speed above 12 mph (20 km/h).

If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: Drive on carefully.

Visit a qualified specialist workshop.

Risk of accidentESP, BAS, PRE-SAFE, the HOLD function, hill start assist and ESP trailer stabilization are unavailable due to Risk of accident

ESP, BAS, PRE-SAFE, the HOLD function,
hill start assist and ESP trailer stabilization are unavailable due to a malfunction.

BAS PLUS and PRE-SAFE Brake may also have failed.

In addition, the warning lamps light up in and
the instrument cluster. warning lamps light up in
the instrument cluster.

ATTENTION ASSIST is deactivated.

The brake system continues to function normally, but without the functions listed above.

Drive on carefully.

Visit a qualified specialist workshop.

Risk of accidentEBD (electronic brake force distribution), ABS, ESP, BAS, PRESAFE , the HOLD function, hill start assist and ESP Risk of accident

EBD (electronic brake force distribution),
ABS, ESP, BAS, PRESAFE , the HOLD function, hill start assist and ESP trailer stabilization are unavailable due to a malfunction.

BAS PLUS and PRE-SAFE Brake may also have failed.

In addition, the and,
warning lamps light up in and
the instrument cluster and a warning tone sounds. warning lamps light up in
the instrument cluster and a warning tone sounds.

ATTENTION ASSIST is deactivated.

The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example.

Drive on carefully.

Visit a qualified specialist workshop immediately.

The brake pads/linings have reached their wear limit. The brake pads/linings have reached their wear limit.

Visit a qualified specialist workshop.

The red  (USA only)/ The red (Canada only) indicator (USA only)/
lamp flashes and a warning tone sounds. A condition for automatic (Canada only) indicator
lamp flashes and a warning tone sounds. A condition for automatic release of the electric parking brake is not fulfilled.

You are driving with the electric parking brake applied.

Release the electric parking brake manually.

The red (Canada only) indicator (USA only)/
lamp flashes and a warning tone sounds. (Canada only) indicator
lamp flashes and a warning tone sounds.

You are making an emergency stop using the electric parking brake.

The yellow  warning The yellow lamp lights up. warning
lamp lights up.

The electric parking brake is malfunctioning.

To apply:
Switch off the ignition.

Press the electric parking brake handle for at least 10 seconds.

Shift the transmission to P.

Consult a qualified specialist workshop.

The yellow lamp and the red  (USA warning
lamp and the red only)/  (Canada only) (USA
only)/ indicator lamp light up. (Canada only)
indicator lamp light up.

The electric parking brake is malfunctioning.

To release:
Switch off the ignition and turn it back on.

Release the electric parking brake manually.

or
Release the electric parking brake automatically.

If the yellow remains lit or continues to flash: warning lamp
remains lit or continues to flash: Do not drive on.

Consult a qualified specialist workshop.

The red (Canada only) indicator (USA only)/
lamp flashes and the yellow (Canada only) indicator
lamp flashes and the yellow warning lamp lights up.
warning lamp lights up.

The electric parking brake is malfunctioning.

To release:
Switch off the ignition and turn it back on.

Release the electric parking brake manually.

To apply:
Switch off the ignition and turn it back on.

Apply the electric parking brake manually.

If the red (Canada only) indicator (USA only)/
lamp continues to flash: (Canada only) indicator
lamp continues to flash: Do not drive on.

Secure the vehicle against rolling away.

Shift the transmission to P.

Turn the front wheels towards the curb.

Consult a qualified specialist workshop.

The yellow lamp lights up. The red warning
lamp lights up. The red (USA only)/  (Canada only)
(USA only)/ indicator lamp flashes for approximately 10 seconds after the electric (Canada only)
indicator lamp flashes for approximately 10 seconds after the electric parking brake has been applied or released. It then goes out or remains lit.

The electric parking brake is malfunctioning.

Switch off the ignition and turn it back on.

Engage the electric parking brake.

If it is not possible to engage the electric parking brake: Shift the transmission to P.

Visit a qualified specialist workshop.

If it is not possible to release the electric parking brake: Release the electric parking brake automatically.

If the electric parking brake still cannot be released: Consult a qualified specialist workshop.

The yellow lamp lights up. When you release or apply the electric parking brake warning
lamp lights up. When you release or apply the electric parking brake manually, the red only)/  (Canada only) (USA
only)/ indicator lamp flashes. (Canada only)
indicator lamp flashes.

The electric parking brake is malfunctioning. It is not possible to apply the electric parking brake manually.

Shift the transmission to P.

Visit a qualified specialist workshop.

The yellow  warning The yellow lamp lights up. The red warning
lamp lights up. The red (USA only)/  (Canada only)
(USA only)/ indicator lamp flashes for approximately 10 seconds after the electric (Canada only)
indicator lamp flashes for approximately 10 seconds after the electric parking brake has been applied or released. It then goes out or remains lit.

The electric parking brake is malfunctioning, e.g. because of overvoltage or undervoltage.

Remove the cause for the overvoltage or undervoltage, e.g. by charging the battery or restarting the engine.

Engage or release the electric parking brake.

If it remains impossible to apply or release the electric parking brake:
Switch off the ignition and turn it back on.

Engage or release the electric parking brake.

If the electric parking brake still cannot be released: Consult a qualified specialist workshop.

The display message is only shown while the vehicle is in motion.

The yellow lights up and the red  (USA warning lamp
lights up and the red only)/  (Canada only) (USA
only)/ indicator lamp flashes. (Canada only)
indicator lamp flashes.

It is not possible to apply the electric parking brake manually.

Shift the transmission to P.

Visit a qualified specialist workshop.

The red  (USA only)/ The red (Canada only) indicator (USA only)/
lamp lights up. (Canada only) indicator
lamp lights up.

You attempted to release the electric parking brake while the ignition was switched off.

SmartKey: turn the SmartKey to position 1 in the ignition lock.

KEYLESS-GO: switch on the ignition.

Risk of accidentThere is not enough brake fluid in the brake fluid reservoir. Risk of accident

There is not enough brake fluid in the
brake fluid reservoir.

Additionally, the red only)/  (Canada only) (USA
only)/ warning lamp lights up in the instrument cluster and a warning tone (Canada only)
warning lamp lights up in the instrument cluster and a warning tone sounds.

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.

Engage the electric parking brake.

Consult a qualified specialist workshop.

Do not add brake fluid. This will not rectify the malfunction.

Driving with the message Check Brake Fluid Level displayed can result in an WARNING
Driving with the message Check Brake Fluid Level displayed can result in an accident. Have your brake system checked immediately.

Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be seriously burned.











Display messages

Possible causes/consequences and Solutions

USA only: one or more of the main functions in the mbrace system are 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.

USA only: have the mbrace system checked at a qualified specialist workshop.

Canada only: have the TELEAID system checked at a qualified specialist workshop.

Risk of injuryImportant functions of PRE-SAFE have failed. All other occupant safety systems, e.g. air bags, remain Risk of injury

Important functions of PRE-SAFE have
failed. All other occupant safety systems, e.g. air bags, remain available.

Visit a qualified specialist workshop immediately.

Risk of accidentPRE-SAFE Brake is temporarily inoperative if: Risk of accident

PRE-SAFE Brake is temporarily inoperative
if:
- the DISTRONIC PLUS cover in the radiator grill is dirty.

- the sensors in the bumpers are dirty.

- its function is impaired due to heavy rain or snow.

- the 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 system is outside the operating temperature range.

- the on-board voltage is too low.

PRE-SAFE Brake is operational again and the display message disappears if:
- the dirt (e.g. slush) drops away while the vehicle is in motion.

- the system detects that the sensors are fully available again.

- the system is within the operating temperature range.

If the display message continues to be displayed: Clean the DISTRONIC PLUS cover in the radiator grill.

Clean the bumpers.

Restart the engine.

Wait until the battery is sufficiently charged.

Risk of accidentPRE-SAFE Brake is defective. BAS PLUS or the distance warning signal may also have failed. Risk of accident

PRE-SAFE Brake is defective. BAS PLUS or
the distance warning signal may also have failed.

Visit a qualified specialist workshop.

Risk of injuryThere is a malfunction in the SRS (Supplemental Restraint System). The Risk of injury

There is a malfunction in the SRS
(Supplemental Restraint System). The up in the instrument cluster. warning lamp also lights
up in the instrument cluster.

Visit a qualified specialist workshop.

Risk of injurySRS has malfunctioned at the front on the left or right. The  warning Risk of injury

SRS has malfunctioned at the front on the
left or right. The lamp also lights up in the instrument cluster. warning
lamp also lights up in the instrument cluster.

Visit a qualified specialist workshop.

Risk of injurySRS has malfunctioned at the rear on the left or right. The  warning Risk of injury

SRS has malfunctioned at the rear on the
left or right. The lamp also lights up in the instrument cluster. warning
lamp also lights up in the instrument cluster.

Visit a qualified specialist workshop.

Risk of injurySRS has malfunctioned at the rear center. The  warning lamp also Risk of injury

SRS has malfunctioned at the rear center.
The lights up in the instrument cluster. warning lamp also
lights up in the instrument cluster.

Visit a qualified specialist workshop.

Risk of injuryThere is a malfunction in the left-hand and/or right-hand window curtain air bag. The Risk of injury

There is a malfunction in the left-hand
and/or right-hand window curtain air bag. The up in the instrument cluster. warning lamp also lights
up in the instrument cluster.

Visit a qualified specialist workshop.

In the event a malfunction of the SRS is indicated as outlined above, the SRS WARNING
In the event a malfunction of the SRS is indicated as outlined above, the SRS may not be operational.

For your safety, we strongly recommend that you contact an authorized Mercedes-Benz Center immediately to have the system checked. Otherwise the SRS may not be activated when needed in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and unnecessarily which could also result in injury.



Display messages

Possible causes/consequences and Solutions

The front-passenger air bag is enabled during the journey, even The front-passenger air bag is enabled during the journey, even though:
- a child, a small adult or an object weighing less than the system's weight threshold is located on the front-passenger seat.

- the front-passenger seat is unoccupied.

The system may detect objects or forces applying additional weight on the seat.

Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.

Engage the parking brake.

Switch off the ignition.

Open the front-passenger door.

Remove the child and the child restraint system from the frontpassenger seat.

If necessary, secure the child in a child restraint system on a suitable rear seat.

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.

Keep the seat unoccupied, close the front-passenger door and switch on the ignition.

Observe the and the multifunction display and check the following: indicator lamp
and the multifunction display and check the following: Seat unoccupied and ignition switched on: - the light up and remain lit. When the indicator lamp is on, OCS has indicator lamp must
light up and remain lit. When the indicator lamp is on, OCS has deactivated the front-passenger air bag.

- the Front Passenger Airbag Enabled See Operator's Manual or Front Passenger Airbag Disabl'd See Operator's Manual display messages must not appear in the multifunction display. Wait for a period of at least 60 seconds until the necessary system checks have been completed and to make sure that the display messages do not appear in the multifunction display.

If these conditions are fulfilled, the front-passenger seat can be occupied again. Whether the indicator lamp remains lit or goes out depends on how OCS classifies the
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.

Visit a qualified specialist workshop immediately.

If the  indicator lamp WARNING
If the

remains off even after performing the above corrective steps, do indicator lamp
remains off even after performing the above corrective steps, do not have any children 12 years old and under and other small individuals use the front-passenger seat until the system has been repaired.



Display messages

Possible causes/consequences and Solutions

The front-passenger air bag is deactivated during the journey even The front-passenger air bag is deactivated during the journey even though an adult or a 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.

Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.

Engage the parking brake.

Switch off the ignition.

Have the occupant get out of the vehicle.

Keep the seat unoccupied, close the front-passenger door and switch on the ignition.

Observe the and the multifunction display and check the following: indicator lamp
and the multifunction display and check the following: Seat unoccupied and ignition switched on: - the light up and remain lit. When the indicator lamp is on, OCS has indicator lamp must
light up and remain lit. When the indicator lamp is on, OCS has deactivated the front-passenger air bag.

- the Front Passenger Airbag Enabled See Operator's Manual or Front Passenger Airbag Disabled See Operator's Manual display messages must not appear in the multifunction display. Wait for a period of at least 60 seconds until the necessary system checks have been completed and to make sure that the display messages do not appear in the multifunction display.

If these conditions are fulfilled, the front-passenger seat can be occupied again. Whether the indicator lamp remains lit or goes out depends on how OCS classifies the
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.

Visit a qualified specialist workshop immediately.

If the  indicator lamp WARNING
If the

remains lit with an adult occupant on the front-passenger seat indicator lamp
remains lit with an adult occupant on the front-passenger seat even after performing the above corrective steps, do not have any passenger use the frontpassenger seat until the system has been repaired.

Lights

Display messages about LEDs:
Display messages about LEDs: This display message will only appear if all LEDs have failed.



























Display messages

Possible causes/consequences and Solutions

The left or right-hand cornering light is defective. The left or right-hand cornering light is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand low-beam headlamp is defective. The left or right-hand low-beam headlamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand trailer tail lamp is faulty. The left or right-hand trailer tail lamp is faulty.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand trailer turn signal lamp is defective. The left or right-hand trailer turn signal lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The trailer brake lamp is defective. The trailer brake lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The rear left-hand or rear right-hand turn signal is defective. The rear left-hand or rear right-hand turn signal is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The front left-hand or front right-hand turn signal is defective. The front left-hand or front right-hand turn signal is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The turn signal in the left-hand or right-hand exterior mirror is The turn signal in the left-hand or right-hand exterior mirror is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The high-mounted brake lamp is faulty. The high-mounted brake lamp is faulty.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand brake lamp is defective. The left or right-hand brake lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand high beam is defective. The left or right-hand high beam is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The license plate lamps are faulty. The license plate lamps are faulty.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The rear fog lamp is defective. The rear fog lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The front left or front right parking or standing lamp is The front left or front right parking or standing lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The backup lamp is defective. The backup lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right front side marker lamp is defective. The left or right front side marker lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand tail lamp is defective. The left or right-hand tail lamp is defective.

or
The rear left or right side marker lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The left or right-hand daytime running lamp is defective. The left or right-hand daytime running lamp is defective.

Check whether you are permitted to change the bulb yourself.

or
Visit a qualified specialist workshop.

The active light function is defective. The active light function is defective.

Visit a qualified specialist workshop.

The exterior lighting is defective. The exterior lighting is defective.

Visit a qualified specialist workshop.

The light sensor is defective. The light sensor is defective.

Visit a qualified specialist workshop.

The lights are still switched on when you leave the vehicle. A The lights are still switched on when you leave the vehicle. A warning tone also sounds.

Turn the light switch to or .
or .

Adaptive Highbeam Assist is faulty. Adaptive Highbeam Assist is faulty.

Visit a qualified specialist workshop.

Adaptive Highbeam Assist is deactivated and temporarily inoperative. Adaptive Highbeam Assist is deactivated and temporarily inoperative. Possible causes are:
- the windshield in the camera's field of vision is dirty.

- visibility is impaired due to heavy rain, snow or fog.

Clean the windshield.

If the system detects that the camera is fully functional again, the Adaptive Highbeam Assist Now Available display message is shown.

Adaptive Highbeam Assist is operational again.

Engine



Display messages

Possible causes/consequences and Solutions

The coolant level is too low. The coolant level is too low.

Add coolant, observing the warning notes when doing so.

If coolant needs to be added more often than usual, have the engine coolant system checked at a qualified specialist workshop.

Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol WARNING
Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. You could be seriously burned.

The coolant level is too low. Avoid making long journeys with too little coolant
The coolant level is too low. Avoid making long journeys with too little coolant in the cooling system. The engine will otherwise be damaged.

The display messages and the corresponding symbol that indicate that the coolant level is too low must not be ignored.



Display messages

Possible causes/consequences and Solutions

The coolant is too hot. The coolant is too hot.

Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.

Make sure that the air supply to the engine radiator is not blocked, e.g. by snow, slush or ice.

Wait until the display message disappears before restarting the engine. Otherwise, there is a risk of engine damage.

Pay attention to the coolant temperature display.

If the temperature increases again, visit a qualified specialist workshop immediately.

The poly-V-belt may have torn.

Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.

Open the hood.

Check whether the poly-V-belt is torn.

If the poly-V-belt is torn:

Do not continue driving. The engine could otherwise overheat.
Do not continue driving. The engine could otherwise overheat.

Consult a qualified specialist workshop.

If the poly-V-belt is not damaged:

Wait until the display message disappears before restarting the engine. Otherwise, there is a risk of engine damage.

Pay attention to the coolant temperature display.

Visit a qualified specialist workshop.

Driving when your engine is overheated can cause some fluids which may have WARNING
Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned.

Steam from an overheated engine can cause serious burns which can occur just by opening the engine hood. Stay away from the engine if you see or hear steam coming from it.

Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.

If the coolant temperature exceeds 248 F(120 C) do not continue driving. The
If the coolant temperature exceeds 248 F(120 C) do not continue driving. The engine will otherwise be damaged.





Display messages

Possible causes/consequences and Solutions

The engine fan is defective. The engine fan is defective.

At coolant temperatures under 248 F (120 C ), drive to the next qualified specialist workshop.

Avoid subjecting the engine to heavy loads, e.g. driving in mountainous terrain, and stop-and-go traffic.

The battery is not being charged. The battery is not being charged.

Possible causes are:
- a defective alternator - a torn poly-V-belt
Ra malfunction in the electronics Pull over and stop the vehicle safely and switch off the engine, paying attention to road and traffic conditions.

Open the hood.

Check whether the poly-V-belt is torn.

If the poly-V-belt is torn:

Do not continue driving. The engine could otherwise overheat.
Do not continue driving. The engine could otherwise overheat.

Consult a qualified specialist workshop.

If the poly-V-belt is not damaged:

Visit a qualified specialist workshop.

The engine oil level has dropped to the minimum level. The engine oil level has dropped to the minimum level.

A warning tone also sounds.

Check the engine oil level at the latest when next refueling.

If necessary, add engine oil.

If engine oil needs to be added more often than usual, have the engine checked at a qualified specialist workshop.

Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http://www.mbusa.com (USA only).

The oil level is too low. Avoid long journeys with too little engine oil. There
The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of engine damage.

The display messages and the corresponding symbol that indicate that the oil level is too low must not be ignored.










Display messages

Possible causes/consequences and Solutions

The fuel level has dropped into the reserve range. The fuel level has dropped into the reserve range.

Refuel at the nearest gas station.

There is only a very small amount of fuel in the fuel tank. There is only a very small amount of fuel in the fuel tank.

Refuel at the nearest gas station without fail.

The fuel system pressure is too low. The fuel filler cap is not The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking.

Check that the fuel filler cap is correctly closed.

If the fuel filler cap is not correctly closed:

Close the fuel filler cap.

If the fuel filler cap is correctly closed:

Visit a qualified specialist workshop.

Vehicles with a diesel engine: the fuel level has fallen below the Vehicles with a diesel engine: the fuel level has fallen below the reserve range.

Refuel at the nearest gas station.

Only use commercially available vehicular ULTRA-LOW SULFUR HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM).

Vehicles with a diesel engine: the engine air filter is dirty and Vehicles with a diesel engine: the engine air filter is dirty and must be replaced.

Visit a qualified specialist workshop.

Vehicles with a diesel engine: there is water in the fuel filter. Vehicles with a diesel engine: there is water in the fuel filter. The water must be drained off.

Visit a qualified specialist workshop.

The DEF tank is empty. The DEF tank is empty.

Have the DEF tank filled as soon as possible at a qualified specialist workshop.

The DEF level has fallen to a minimum. The DEF level has fallen to a minimum.

Have the DEF tank filled immediately at a qualified specialist workshop.

Driving systems


























Display messages

Possible causes/consequences and Solutions

Based on specific criteria, ATTENTION ASSIST has determined that the Based on specific criteria, ATTENTION ASSIST has determined that the driver is tired or paying less attention. A warning tone also sounds.

If necessary, take a break.

During long journeys, take regular breaks in good time so you get enough rest.

ATTENTION ASSIST has failed. ATTENTION ASSIST has failed.

Visit a qualified specialist workshop.

You cannot change the vehicle level. Possible causes are: You cannot change the vehicle level. Possible causes are: - you are driving too fast for the selected vehicle level.

- you are towing a trailer.

- the trailer-coupling socket is being used, e.g. for a bicycle rack.

Drive more slowly and then select the desired vehicle level again.

Observe the notes on towing a trailer.

You have selected a higher vehicle level. The compressor first needs You have selected a higher vehicle level. The compressor first needs to cool down because of frequent level changes.

Drive in a manner appropriate for the current vehicle level.

Make sure that there is sufficient ground clearance.

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. AIRMATIC is malfunctioning.

Drive in a manner appropriate for the current vehicle level, but no faster than 50 mph (80 km/h).

Make sure that there is sufficient ground clearance.

Have the vehicle checked at a qualified specialist workshop.

The Active Curve System is faulty. The vehicle's handling characteristics may be affected.

Do not drive faster than 50 mph (80 km/h).

Have the vehicle checked at a qualified specialist workshop.

Risk of accidentThe Active Curve System is faulty. The vehicle's handling characteristics are severely impaired. Risk of accident

The Active Curve System is faulty. The
vehicle's handling characteristics are severely impaired.

In addition, the vehicle level display appears between the vehicle icon and the display message, and a warning tone sounds.

Do not drive faster than 12 mph (20 km/h).

Adjust your driving style to the altered handling characteristics.

Visit a qualified specialist workshop immediately.

DSR (Downhill Speed Regulation) is deactivated due to a DSR (Downhill Speed Regulation) is deactivated due to a malfunction.

Have DSR checked at a qualified specialist workshop.

The HOLD function is deactivated. The vehicle is skidding. The HOLD function is deactivated. The vehicle is skidding.

A warning tone also sounds.

Reactivate the HOLD function later.

The radar sensor system is deactivated. The radar sensor system is deactivated.

Switch on the radar sensor system.

Lane Keeping Assist or Active Lane Keeping Assist is deactivated and Lane Keeping Assist or Active Lane Keeping Assist is deactivated and temporarily inoperative. Possible causes are: - the windshield in the camera's field of vision is dirty.

- visibility is impaired due to heavy rain, snow or fog.

- there are no lane markings for a longer period.

- the lane markings are worn, dark or covered, e.g. by dirt or snow.

If the display message does not disappear: Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.

Apply the electric parking brake.

Clean the windshield.

If the system detects that the camera is fully operational, the display message disappears.

Lane Keeping Assist or Active Lane Keeping Assist is operational again.

Lane Keeping Assist or Active Lane Keeping Assist is defective. Lane Keeping Assist or Active Lane Keeping Assist is defective.

Visit a qualified specialist workshop.

Blind Spot Assist or Active Blind Spot Assist is temporarily Blind Spot Assist or Active Blind Spot Assist is temporarily inoperative. Possible causes are: - you have established the electrical connection between the trailer and your vehicle.

- the sensors are dirty.

- function is impaired due to heavy rain or snow.

- the radar sensor system is outside the operating temperature range.

- the 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 also light up in the exterior mirrors. indicator lamps
also light up in the exterior mirrors.

When towing a trailer, confirm the display message with If you are driving without a trailer and the display message does not.


If you are driving without a trailer and the display message does not disappear:
Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.

Apply the electric parking brake.

Clean the sensors.

Restart the engine.

If the system detects that the sensors are fully operational, the display message disappears.

Blind Spot Assist or Active Blind Spot Assist is operational again.

Blind Spot Assist or Active Blind Spot Assist is defective. Blind Spot Assist or Active Blind Spot Assist is defective.

The yellow also light up in the exterior mirrors. indicator lamps
also light up in the exterior mirrors.

Visit a qualified specialist workshop.

The driver's door is open and the driver's seat belt has not been The driver's door is open and the driver's seat belt has not been fastened.

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.

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.

Use Active Parking Assist again later.

You have just carried out a large number of turning or parking You have just carried out a large number of turning or parking maneuvers.

Active Parking Assist will become available again after approximately 10 minutes.

Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.

Switch off and restart the engine.

If the display message continues to be displayed: Visit a qualified specialist workshop.

PARKTRONIC is defective.

Visit a qualified specialist workshop.

The vehicle is parked. A warning tone also sounds. The vehicle is parked. A warning tone also sounds.

The display message disappears automatically.

DISTRONIC PLUS has been deactivated. If it was deactivated DISTRONIC PLUS has been deactivated. If it was deactivated automatically, a warning tone also sounds.
DISTRONIC PLUS is operational again after having been temporarily DISTRONIC PLUS is operational again after having been temporarily unavailable. You can now reactivate DISTRONIC PLUS.
DISTRONIC is deactivated and temporarily inoperative. Possible DISTRONIC is deactivated and temporarily inoperative. Possible causes are:
- the DISTRONIC PLUS cover in the radiator grille is dirty.

- function is impaired due to heavy rain or snow.

- the sensors in the bumpers are dirty.

- the 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 system is outside the operating temperature range.

- The on-board voltage is too low.

A warning tone also sounds.

If the display message does not disappear: Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions.

Apply the electric parking brake.

Clean the DISTRONIC PLUS cover in the radiator grille.

Clean the bumpers.

Restart the engine.

If the system detects that the sensors are fully operational, the display message disappears.

DISTRONIC is operational again.

DISTRONIC PLUS is defective. BAS PLUS (Brake Assist PLUS) and DISTRONIC PLUS is defective. BAS PLUS (Brake Assist PLUS) and PRE-SAFE Brake may be inoperative as well.

A warning tone also sounds.

Visit a qualified specialist workshop.

You have depressed the accelerator pedal. DISTRONIC PLUS is no You have depressed the accelerator pedal. DISTRONIC PLUS is no longer controlling the speed of the vehicle.

Take your foot off the accelerator pedal.

An activation condition for DISTRONIC PLUS is not fulfilled. An activation condition for DISTRONIC PLUS is not fulfilled.

Check the activation conditions for DISTRONIC PLUS.

Cruise control is defective. Cruise control is defective.

Visit a qualified specialist workshop.

A condition for activating cruise control has not been fulfilled. A condition for activating cruise control has not been fulfilled.

You attempted to save a speed of less than 20 mph (30 km/h).

If the situation allows, drive faster than 20 mph (30 km/h) and save the speed.

Check the activation conditions for cruise control.

Tires

Do not drive with a flat tire. A flat tire affects the ability to steer or brake WARNING
Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up and possibly a fire.

Follow recommended tire inflation pressures. WARNING
Follow recommended tire inflation pressures.

Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are more likely to fail from being overheated.

Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are more likely to become punctured or damaged by road debris, potholes etc.



Display messages

Possible causes/consequences and Solutions

The tire pressure monitor is measuring the tire pressure. The tire pressure monitor is measuring the tire pressure.

Drive on.

The tire pressures appear in the multifunction display after you have been driving for a few minutes.

The tire pres<ul></ul></table></ul><div style=
See also:

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