Online Owner's Manual [In depth | On-board computer and displays

Date of printing:

01/23/2022

Online Owner's Manual [In depth | On-board computer and displays | Display messages]

Owner's Manual version: 06-13

Note: The online Owner's Manual is the latest version available. Deviations between this manual and items specific to your vehicle may occur since Mercedes-Benz constantly adapts its vehicles to the latest technology and modifies design and equipment. Please note that this online Owner's Manual does not under any circumstances replace the printed Owner's Manual which is supplied with the vehicle.

Display messages

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Contents

Notes on display messages

Message memory

Display messages on vehicles without steering wheel buttons

Display messages on vehicles with steering wheel buttons

Notes on display messages

Important safety notes

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WARNING

If the instrument cluster has failed or malfunctioned, you may not recognise function restrictions relevant to safety. The operating safety of your vehicle may be impaired. There is a risk of an accident.

Drive on carefully. Have the vehicle checked at a qualified specialist workshop immediately.

The on-board computer shows messages and warnings from certain systems. You should therefore make sure your vehicle is operating safely at all times. You could otherwise cause an accident by driving an unsafe vehicle. If your vehicle is not roadworthy, stop the vehicle as soon as possible, paying attention to road and traffic conditions.

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If you turn the key to position 2 in the ignition, a display check is performed. All warning/indicator lamps (except the turn signal indicator lamps) and the display are activated. Before starting the journey, check that the warning and indicator lamps are operating correctly.

Vehicles without steering wheel buttons

Warnings, malfunctions or additional information may also be shown in the display. The following tables show all the display messages. A warning tone sounds with certain display messages.

Vehicles with steering wheel buttons

The on-board computer shows warnings, malfunctions or additional information in the display. A warning tone sounds with certain display messages. Display messages with a higher priority appear red on the display.

Please respond in accordance with the display messages and follow the additional notes in these Operating Instructions.

You can hide low-priority display messages by pressing the , , or button on the steering wheel or the reset button.

You cannot hide display messages of the highest priority. These messages will continue to be shown in the display until their cause has been eliminated.

The on-board computer stores certain display messages in the message memory more.

The following shows all the messages that could appear in the display, arranged alphabetically.

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Message memory

The on-board computer shows messages and warnings from certain systems. You should therefore make sure your vehicle is operating safely at all times. You could otherwise cause an accident by driving an unsafe vehicle.If your vehicle is not roadworthy, stop the vehicle as soon as possible, paying attention to road and traffic conditions.

If the on-board computer stores certain display messages, the display message are stored in the message memory menu. You can call up the stored display messages.

Using the steering wheel buttons

Press the or button repeatedly until the number of stored display messages, e.g. 2 messages, appears in the display.

If no malfunctions have occurred, the No messages message appears.

Scroll through the stored display messages with the or button.

To exit the message memory menu: press the or button.

When you switch off the ignition, all display messages are deleted from the message memory.

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Display messages on vehicles without steering wheel buttons

Display messages	Possible causes/consequences and Solutions
SRS	The restraint systems have malfunctioned. WARNING If SRS is malfunctioning, individual systems could be triggered inadvertently or might not be triggered at all in the event of an accident. There is an increased risk of injury and accidents. Drive on with care. Visit a qualified specialist workshop immediately.
... LIM km/h	You are accelerating up to the speed stored for permanent SPEEDTRONIC using the accelerator pedal. SPEEDTRONIC controls the speed and the vehicle stops accelerating. Ease off the accelerator pedal.
... LIM km/h	The speed display flashes. You are attempting to set a speed for variable SPEEDTRONIC that is less than the current speed of the vehicle. Apply the brakes yourself as required.
... LIM km/h	The speed display flashes. The vehicle has exceeded the speed set for variable SPEEDTRONIC or the programmed maximum speed for permanent SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode). Apply the brakes yourself as required.
... LIM km/h	The display message flashes and a warning tone sounds three times. The vehicle is accelerating and moving faster than the speed set for variable SPEEDTRONIC or the programmed maximum speed for permanent SPEEDTRONIC. Apply the brakes yourself as required.
_ _ _ LIM km/h	SPEEDTRONIC and/or cruise control have been deactivated due to a fault. Apply the brakes yourself as required. Have SPEEDTRONIC and cruise control checked at a qualified specialist workshop.

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Display messages on vehicles with steering wheel buttons

Safety systems

Display messages	Possible causes/consequences and Solutions
ABS Visit workshop	ABS has been deactivated due to a malfunction. ESP®, ASR and BAS, as well as cruise control and SPEEDTRONIC, have also been deactivated as a result. 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. This causes steerability and braking to be greatly impaired. The braking distance can increase in emergency braking situations. The driven wheels can spin when accelerating. If ESP® is not operational, ESP® will not stabilise the vehicle. There is an increased risk of skidding and accidents. Drive on with care. Visit a qualified specialist workshop immediately.
ABS Unavailable	ABS is temporarily unavailable or is deactivated due to undervoltage. ESP®, ASR and BAS, as well as cruise control and SPEEDTRONIC, are also unavailable as a result. The battery may not be charging. 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. This causes steerability and braking to be greatly impaired. The braking distance can increase in emergency braking situations. The driven wheels can spin when accelerating. If ESP® is not operational, ESP® will not stabilise the vehicle. There is an increased risk of skidding and accidents. Drive for a short distance at a speed of more than 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 with care. Visit a qualified specialist workshop immediately.
Visit workshop	ASR or start-off assist has been deactivated due to a malfunction. The engine power output may be reduced. WARNING The driven wheels can spin when accelerating. There is an increased risk of skidding and accidents. Drive on with care. Visit a qualified specialist workshop immediately.
Visit workshop	BAS has been deactivated due to a malfunction. WARNING The brake system continues to function normally, but without electronic support. The braking distance can increase in emergency braking situations. There is a risk of an accident. Drive on with care. Visit a qualified specialist workshop immediately.
Unavailable	ASR, BAS and start-off assist have been deactivated due to undervoltage. The battery may not be charging. 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 braking distance can increase in emergency braking situations. The driven wheels can spin when accelerating. There is an increased risk of skidding and accidents. Drive on with care. Visit a qualified specialist workshop immediately.
Brake wear Visit workshop	The brake pads/linings have reached their wear limit. Have the brake pads/linings replaced as soon as possible at a qualified specialist workshop.
Brake fluid Visit workshop	There is insufficient brake fluid in the fluid reservoir. WARNING Braking performance can be impaired. There is a risk of an accident. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Check the brake fluid level in the brake fluid reservoir more. If the brake fluid is below the MIN mark: Do not continue driving under any circumstances. Do not top up the brake fluid. This does not solve the problem. Consult a qualified specialist workshop. If the brake fluid is above the MIN mark: Drive on with care. Visit a qualified specialist workshop immediately.
Brake force distribution	EBD has been deactivated due to undervoltage. The battery may not be charging. WARNING The rear wheels could lock when you apply the brakes. The braking distance can increase in emergency braking situations. There is an increased risk of skidding and accidents. Drive on with care. Visit a qualified specialist workshop immediately.
Brake force distribution Visit workshop	EBD has been deactivated due to a malfunction. WARNING The rear wheels could lock when you apply the brakes. The braking distance can increase in emergency braking situations. There is an increased risk of skidding and accidents. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Do not drive on. Consult a qualified specialist workshop.
ESP Visit workshop	ESP® has been deactivated due to a malfunction. Cruise control and SPEEDTRONIC have also been deactivated as a result. Engine power output may be reduced. WARNING If ESP® is not operational, ESP® will not stabilise the vehicle. There is an increased risk of skidding and accidents. Drive on with care. Visit a qualified specialist workshop immediately.
ESP Unavailable	ESP® has been deactivated due to undervoltage. Cruise control and SPEEDTRONIC have also been deactivated as a result. The battery may not be charging. WARNING If ESP® is not operational, ESP® will not stabilise the vehicle. There is an increased risk of skidding and accidents. Drive on with care. Consult a qualified specialist workshop as soon as possible.
Parking brake Release brake	A warning tone also sounds. You are driving with the parking brake applied. Release the parking brake more.
Seatbelt sys. Visit workshop	The belt system has malfunctioned. WARNING In the event of an accident or a rapid deceleration, the seat belts either cannot protect you as intended. There is a risk of injury. Consult a qualified specialist workshop as soon as possible.
SRS Restraint system Visit workshop	The restraint systems have malfunctioned. WARNING If SRS is malfunctioning, individual systems could be triggered inadvertently or might not be triggered at all in the event of an accident. There is an increased risk of injury and accidents. Drive on with care. Visit a qualified specialist workshop immediately.

Lights

Display messages	Possible causes/consequences and Solutions
Dipped-beam headlamp left	The left-hand dipped-beam headlamp is faulty. Halogen headlamps: replace the bulb as soon as possible more. Bi-xenon headlamps: consult a qualified specialist workshop as soon as possible.
Dipped-beam headlamp right	The right-hand dipped-beam headlamp is faulty. Halogen headlamps: replace the bulb as soon as possible more. Bi-xenon headlamps: consult a qualified specialist workshop as soon as possible.
Trailer turn signal left	The left-hand turn signal on the trailer is faulty. Replace the bulb as soon as possible. For trailers with LED bulbs, please observe the notes in the "Bulb failure indicator on LED bulbs" section more.
Trailer turn signal right	The right-hand turn signal on the trailer is faulty. Replace the bulb as soon as possible. For trailers with LED bulbs, please observe the notes in the "Bulb failure indicator on LED bulbs" section more.
Trailer brake lamp	The brake lamp on the trailer is faulty. Replace the bulb as soon as possible. For trailers with LED bulbs, please observe the notes in the "Bulb failure indicator on LED bulbs" section more.
Trailer lights left Check bulb	The left-hand trailer tail lamp or the left-hand licence plate lamp is faulty. Replace the bulb as soon as possible. For trailers with LED bulbs, please observe the notes in the "Bulb failure indicator on LED bulbs" section more.
Trailer lights right Check bulb	The right-hand trailer tail lamp or the right-hand licence plate lamp is faulty. Replace the bulb as soon as possible. For trailers with LED bulbs, please observe the notes in the "Bulb failure indicator on LED bulbs" section more.
Lights on automatical. Remove key	The automatic headlamp feature is active: the light switch is in the position and you have forgotten to remove the key. Remove the key from the ignition lock.
Turn signal left	The left-hand turn signal is faulty. Change the bulb as soon as possible in the front more or rear more indicator lamp.
Turn signal right	The right-hand turn signal is faulty. Change the bulb as soon as possible in the front more or rear more indicator lamp.
Brake lamp left	The left-hand brake lamp is faulty. Replace the bulb as soon as possible more.
Brake lamp right	The right brake lamp is faulty. Replace the bulb as soon as possible more.
Third brake lamp	The third brake lamp is faulty. This display message will only appear if all LEDs have failed. Consult a qualified specialist workshop as soon as possible.
Main-beam headlamp left	The left-hand main-beam headlamp is faulty. Replace the bulb as soon as possible more.
Main-beam headlamp right	The right-hand main-beam headlamp is faulty. Replace the bulb as soon as possible more.
Licence plate lamp	A licence plate lamp is faulty. Replace the bulb as soon as possible more.
Switch off lights	You have forgotten to switch off the lights when leaving the vehicle. Turn the light switch to .
Foglamp front left	The left-hand foglamp lamp is faulty. Replace the bulb as soon as possible more.
Foglamp front right	The right-hand foglamp is faulty. Replace the bulb as soon as possible more.
Rear foglamp	The rear foglamp is faulty. Replace the bulb as soon as possible more.
Parking lamp front left	The left-hand front parking lamp is faulty. Replace the bulb as soon as possible more.
Parking lamp front right	The front right parking lamp is faulty. Replace the bulb as soon as possible more.
Reversing lamp	One of the reversing lamps is faulty. Replace the bulb as soon as possible more.
Tail lamp left	The left-hand tail lamp is faulty. Replace the bulb as soon as possible more.
Tail lamp right	The right-hand tail lamp is faulty. Replace the bulb as soon as possible more.
Additional ind. lamps	An additional turn signal is faulty. Replace the bulb as soon as possible more.

Engine

Display messages	Possible causes/consequences and Solutions
Exhaust filter: Drive at high engine speed. See Owner's Manual.	The automatic regeneration of the diesel particle filter is not sufficient or has malfunctioned. Drive at an engine speed of above 2000 rpm until the display message disappears. If the display message does not go out after approximately 20 minutes, have the malfunction rectified immediately at a qualified specialist workshop.
Coolant Stop, turn engine off	The coolant temperature is too high. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Consult a qualified specialist workshop.
Coolant Stop, turn engine off	The coolant temperature is too high. If you stop the vehicle after it has been subjected to extreme loads, the coolant warning lamp may light up when the ignition is switched on or the engine is restarted. Such loads occur, for example, when driving in mountainous terrain or when towing a trailer. Run the engine for approximately 1 minute at idling speed. Consult a qualified specialist workshop if the display message continues to be shown.
Check coolant level	The coolant level is too low. Do not run the engine if the coolant level is too low. The engine could overheat and become damaged. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Switch off the engine and let it cool down. Top up the coolant; be sure to observe the warning notes more. If you need to top up the coolant frequently, have the engine cooling system checked at a qualified specialist workshop.
Reserve fuel Drive to a filling stat.	The fuel level has fallen into the reserve range. Refuel at the nearest filling station more.
Water in fuel Visit workshop	The water that has collected in the water separator has reached the maximum level. Drain the water separator more.
Air cleaner dirty	The service due date for the air filter has been reached. The air filter is dirty. Have the air filter element replaced as soon as possible at a qualified specialist workshop.
Engine oil Add 1.0 litre	The oil level is too low. Check the engine oil level the next time you refuel more and top up the oil.
Engine oil level Not when eng. running	You want to check the engine oil level, even though the engine is still running. Switch off the engine. Check the oil level more.
Engine oil level Reduce oil level	You have added too much engine oil. There is a risk of damaging the engine or catalytic converter. Check the oil level. If the oil level is too high: have the engine oil extracted at the next qualified specialist workshop. If the oil level is correct: have the malfunction rectified at the next qualified specialist workshop.
Engine oil level Stop, turn engine off	There is not enough or no oil in the engine. There is a danger of engine damage. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Check the engine oil level using the oil dipstick more. If the engine oil level is correct: have the malfunction rectified immediately at a qualified specialist workshop. If the engine oil level is too low: have the vehicle towed to a qualified specialist workshop.
Oil sensor Visit workshop	There is a malfunction in the engine oil level display. Have the vehicle checked immediately at a qualified specialist workshop.
Visit workshop	The diesel particle filter is full. Have the diesel particle filter checked at a qualified specialist workshop as soon as possible.

Driving systems

Display messages	Possible causes/consequences and Solutions
Speed limit ... km/h	The speed display flashes. You are attempting to set a speed for variable SPEEDTRONIC that is less than the current speed of the vehicle. Apply the brakes yourself as required.
Speed limit ... km/h	The speed display flashes. The vehicle has exceeded the speed set for variable SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode). Apply the brakes yourself as required.
Speed limit ... km/h exceeded.	The speed display flashes and a warning tone sounds three times. The vehicle is accelerating and exceeding the speed set for variable SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode). Apply the brakes yourself as required.
Speed limit Winter tyres ... km/h	You are accelerating up to the set speed for permanent SPEEDTRONIC using the accelerator pedal. SPEEDTRONIC controls the speed and the vehicle stops accelerating. Ease off the accelerator pedal.
Speed limit Winter tyres ... km/h	The speed display flashes. The vehicle has exceeded the speed set for permanent SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode). Apply the brakes yourself as required.
Speed limit Winter tyres ... km/h exceeded	The speed display flashes and a warning tone sounds three times. The vehicle is accelerating and exceeds the speed set for permanent SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode). Apply the brakes yourself as required.
Speedtronic/Cruise cont. Visit workshop	SPEEDTRONIC and/or cruise control have been deactivated due to a fault. Apply the brakes yourself as required. Have SPEEDTRONIC and cruise control checked at a qualified specialist workshop.

Tyres

Display messages	Possible causes/consequences and Solutions
Tyre press. Adj. press.	The pressure in one or more tyres is too low or there is a significant difference between tyre pressures on individual wheels. Check the tyre pressure at the next opportunity and correct it if necessary more.
Tyre press. monitor inoperative	The tyre pressure monitor has malfunctioned. Have the tyre pressure monitor and the wheels checked at a qualified specialist workshop.
Tyre press. monitor currently unavail.	The tyre pressure monitor function is temporarily unavailable due to radio interference or undervoltage. Once the causes have been remedied, the tyre pressure monitor is automatically activated.
Tyre press.- monitor inoperative No wheel sensors	The tyre pressure monitor is not receiving signals from one or more wheels because: a wheel has been replaced with the spare wheel without wheel electronics. the maximum temperature on one of the wheel electronics units has been exceeded. a wheel electronics unit is malfunctioning. Have the tyre pressure monitor and the wheels checked at a qualified specialist workshop.
Check tyre(s)	The pressure of one or more tyres has dropped significantly. If the tyre pressure monitor has detected the affected wheel, the wheel position is also displayed. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Check the tyres. Repair or change the wheel if necessary more. Check the tyre pressure and correct it if necessary more. The display message disappears automatically after driving for a few minutes with the corrected tyre pressure.
Caution Tyre defect	One or more tyres is losing air rapidly. If the tyre pressure monitor has detected the affected wheel, the wheel position is also displayed. Stop the vehicle as soon as road and traffic conditions allow and avoid any sudden steering or braking manoeuvres. Repair or change the wheel more.

Vehicle

Display messages	Possible causes/consequences and Solutions
Steering assistance failure	The power assistance for the steering has malfunctioned. You need to steer more forcefully. Carefully continue to a qualified specialist workshop and have the steering checked immediately.
Battery/Alternator Visit workshop	The battery is not being charged. Possible causes are a defective alternator or a torn poly-V-belt. Stop the vehicle as soon as possible, paying attention to road and traffic conditions. Check the poly-V-belt. If the poly-V-belt is torn: do not continue driving. Consult a qualified specialist workshop. If the poly-V-belt is not damaged: have the vehicle checked as soon as possible by a qualified specialist workshop.
E-Box	The fan in the E box is malfunctioning. Turn the key to position 0 and then back to position 2 in the ignition lock. If the warning message does not disappear, consult a qualified specialist workshop.
ENR Warning! Vehicle height	The vehicle level is too low or too high while driving. Handling and ride comfort may suffer. Drive on with care. ENR adjusts the vehicle level to normal level as soon as possible. If the display message does not disappear, drive on with care and consult a qualified specialist workshop as soon as possible. An air bellow may be leaking.
ENR not activated	A malfunction has caused ENR to switch off or be deactivated because, for example, external influences have caused the vehicle to be raised while stationary. The vehicle level is no longer automatically compensated. Handling and ride comfort may suffer. Drive on for a short distance at a speed of more than 2 km/h. ENR is activated automatically. If the display message does not disappear, drive on with care and consult a qualified specialist workshop as soon as possible.
Depress clutch	You are attempting to start the engine and the clutch pedal is not completely depressed. Before starting the engine, depress the clutch pedal as far as it will go.
Bonnet open	You are already driving at walking pace, even though the bonnet is not closed. Close the bonnet.
Please enter PIN:	You have not yet entered your PIN in the mobile phone. Enter the PIN for the SIM card.
Slid. sunroof open	You have removed the key from the ignition lock and the sliding sunroof is still open. Close the sliding sunroof if desired more.
Doors open	You are already driving at walking pace, even though not all the doors are closed. Close the doors.
Washer fluid Check level	The washer fluid level is too low. Top up the washer fluid more.