Mercedes-Benz S-Class 2011 Operator's Manual page 406

Display messages
404
Display messages
Lane Keeping
Assist Currently
Unavailable See
Oper. Manual
Active Lane
Keeping Assist
Currently
Unavailable See
Oper. Manual
Lane Keeping
Assist Inoperative
Active Lane
Keeping Assist
Inoperative
Blind Spot Assist
Currently
Unavailable See
Oper. Manual
Active Blind Spot
Assist Currently
Unavailable See
Oper. Manual
Possible causes/consequences and M Solutions
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.
R
visibility is impaired due to heavy rain, snow or fog.
R
there are no lane markings for a longer period.
R
the lane markings are worn, dark or covered, for example by dirt
R
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.
R
the system detects that the camera is fully operational again.
R
If the display message continues to be displayed:
X
Clean the windshield.
Lane Keeping Assist or Active Lane Keeping Assist is faulty.
X
Visit a qualified specialist workshop.
Blind Spot Assist or Active Blind Spot Assist is temporarily
inoperative if:
the sensors are dirty.
R
its function is impaired due to heavy rain or snow.
R
the radar sensor system is outside the operating temperature
R
range.
the radar sensor system is temporarily inoperative, e.g. due to
R
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.
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.
R
the system detects that the sensors are fully available again.
R
the radar sensor system is back within the operating
R
temperature range.
If the display message continues to be displayed:
X
Clean the sensors (
X
Restart the engine.
Y page 456).