Mercedes-Benz M-Class 2012 Owners Manual - Manual (Page 262)

Display messages Possible causes/consequences and M Solutions
Lane Keeping
Assist Inoperative
or Active Lane
Keeping Assist
Inoperative
Lane Keeping Assist or Active Lane Keeping Assist is defective.
X Visit a qualified specialist workshop.
Blind Spot Assist
Currently
Unavailable See
Operator's Manual
or Active Blind
Spot Assist
Currently
Unavailable See
Operator's Manual
Blind Spot Assist or Active Blind Spot Assist is temporarily
inoperative. Possible causes are:
R you have established the electrical connection between the
trailer and your vehicle.
R the sensors are dirty.
R function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R 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 9 indicator lamps also light up in the exterior
mirrors.
X
When towing a trailer, confirm the display message with a.
If you are driving without a trailer and 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 Apply the electric parking brake.
X Clean the sensors (
Y
page 322).
X 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
Inoperative
or Active Blind
Spot Assist
Inoperative
Blind Spot Assist or Active Blind Spot Assist is defective.
The yellow 9 indicator lamps also light up in the exterior
mirrors.
X
Visit a qualified specialist workshop.
Park Assist
Canceled 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.
260
Display messages
On-board
comput
er
and
displays