Driving systems

Display messages Possible causes/consequences and Solutions
Based on specific criteria, ATTENTION ASSIST has determined that Based on specific criteria, ATTENTION ASSIST has determined that the driver is tired or paying less attention. A warning tone also sounds.
break. 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.
specialist workshop. Visit 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.
function later. Reactivate the HOLD function later.
The HOLD function is deactivated. When the brake pedal is firmly depressed, an activation condition is not fulfilled.
A warning tone also sounds.
conditions for the HOLD function. Check the activation conditions for the HOLD function.
The radar sensor system is deactivated. The radar sensor system is deactivated.
system Switch on the radar sensor system
Lane Keeping Assist or Active Lane Keeping Assist is deactivated Lane Keeping Assist or Active Lane Keeping Assist is deactivated and temporarily inoperative if:
• the windshield is dirty in the camera's field of vision.
• 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, for example by dirt or snow.
Lane Keeping Assist or Active Lane Keeping Assist is operational again and the display message disappears if:
• the dirt (e.g. slush) drops away while the vehicle is in motion.
• the system recognizes that the camera is fully operational again.
If the display message continues to be displayed:
Clean the windshield.
Lane Keeping Assist or Active Lane Keeping Assist is defective. Lane Keeping Assist or Active Lane Keeping Assist is defective.
specialist workshop. 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 if:
• the sensors are dirty.
• its 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 indicator lamps also light up in the exterior mirrors.
Blind Spot Assist or Active Blind Spot Assist 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 radar sensor system is back within the operating temperature range.
If the display message continues to be displayed:
Restart the engine. Clean the sensors.
Restart the engine.
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 indicator lamps also light up in the exterior mirrors.
specialist workshop. Visit a qualified specialist workshop.
Parking Guidance is malfunctioning. Parking Guidance is malfunctioning.
If the display message continues to be displayed: Restart the engine.
If the display message continues to be displayed:
specialist workshop. Visit a qualified specialist workshop.
Parking Guidance has been deactivated because: Parking Guidance has been deactivated because:
• the vehicle is skidding.
• the sensors are dirty.
• a malfunction has occurred.
A warning tone also sounds.
later. Reactivate Parking Guidance later.
If the parking space symbol is not displayed in the multifunction display when you are driving at a speed of less than 19 mph (30 km/h):
Restart the engine. Clean the sensors.
If the parking space symbol is still not displayed in the Restart the engine.
If the parking space symbol is still not displayed in the multifunction display when you are driving at a speed of less than 19 mph (30 km/h):
specialist workshop. Visit a qualified specialist workshop.
Parking Guidance has been deactivated because you are no longer following the recommended path.
so, observe the display messages Park again and, while doing so, observe the display messages in the multifunction display.
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 DISTRONIC PLUS has been deactivated. If it was deactivated automatically, a warning tone also sounds.
DISTRONIC PLUS is operational again after having been DISTRONIC PLUS is operational again after having been temporarily unavailable. You can now reactivate DISTRONIC PLUS.
DISTRONIC PLUS is deactivated and is temporarily inoperative if: DISTRONIC PLUS is deactivated and is temporarily inoperative if:
• the DISTRONIC PLUS cover in the radiator grill is dirty.
• its 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.
DISTRONIC PLUS 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:
cover in the radiator grill. Clean the DISTRONIC PLUS cover in the radiator grill.
Restart the engine. Clean the bumpers.
Restart the engine.
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.
specialist workshop. 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.
accelerator pedal. 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.
conditions for DISTRONIC PLUS. Check the activation conditions for DISTRONIC PLUS.
Cruise control is defective. Cruise control is defective.
A warning tone also sounds.
specialist workshop. 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).
drive faster than 20 mph (30 km/h) and If the situation allows, drive faster than 20 mph (30 km/h) and save the speed.
conditions for cruise control. Check the activation conditions for cruise control.
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