Driving systems
Display messages | Possible causes/consequences and
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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. |
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ATTENTION ASSIST has failed. – Visit a qualified specialist workshop. |
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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. |
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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. |
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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. |
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![]() The Active Curve System is faulty. The
vehicle's handling characteristics are severely impaired. |
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DSR (Downhill Speed Regulation) is deactivated due to a
malfunction. – Have DSR checked at a qualified specialist workshop. |
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The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. – Reactivate the HOLD function later. |
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The radar sensor system is deactivated. – Switch on the radar sensor system. |
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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. |
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Lane Keeping Assist or Active Lane Keeping Assist is defective. – Visit a qualified specialist workshop. |
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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 ![]() – When towing a trailer, confirm the display message with ![]() 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. |
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Blind Spot Assist or Active Blind Spot Assist is defective. The yellow ![]() – Visit a qualified specialist workshop. |
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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. |
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The vehicle has started to skid and ESP® has intervened. – Use Active Parking Assist again later. |
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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. |
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The vehicle is parked. A warning tone also sounds. The display message disappears automatically. |
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DISTRONIC PLUS has been deactivated. If it was deactivated automatically, a warning tone also sounds. |
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DISTRONIC PLUS is operational again after having been temporarily unavailable. You can now reactivate DISTRONIC PLUS. |
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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. |
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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. |
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You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle. – Take your foot off the accelerator pedal. |
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An activation condition for DISTRONIC PLUS is not fulfilled. – Check the activation conditions for DISTRONIC PLUS. |
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Cruise control is defective. – Visit a qualified specialist workshop. |
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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. |
See also:
Maximum tire pressure
WARNING
Never exceed the maximum tire inflation
pressure. Follow recommended tire inflation
pressures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adve ...
Convenience
Activating/deactivating the EASYENTRY/
EXIT feature
You can use the Easy Entry/Exit: function
to activate or deactivate the EASY ENTRY/EXIT feature.
WARNING
You must make sure no one can beco ...
Transmission position D with ECO
start/stop function activated
The ECO start/stop function switches the
engine off automatically if the vehicle is
braked to a standstill when in transmission
position D and the brake is still depressed.
For further informat ...