Mercedes-Benz S-Class Coupe Operator's Manual page 263

Display messages
Radar Sensors
Dirty See Opera‐
tor's Manual
Possible causes/consequences and M Solutions
At least one of the following driving systems or driving safety sys-
tems is temporarily restricted or inoperative:
®
PRE-SAFE PLUS
R
®
PRE-SAFE Brake
R
COLLISION PREVENTION ASSIST PLUS
R
Active Lane Keeping Assist
R
Active Blind Spot Assist
R
DISTRONIC PLUS with Steering Assist and Stop&Go Pilot
R
If the radar sensor system in front is dirty, Active Blind Spot Assist
will not perform a course-correcting brake application.
Possible causes are:
the sensors in the radiator trim and/or in the bumpers are dirty
R
the function of the driving system and/or driving safety system
R
is impaired due to heavy rain or snow.
A warning tone also sounds.
When the causes stated above no longer apply, the display mes-
sage disappears. All driving systems and driving safety systems
are operative again.
If the display message does not disappear:
Pull over and stop the vehicle safely as soon as possible, paying
X
attention to road and traffic conditions.
Secure the vehicle against rolling away (
X
Switch off the engine.
X
Clean the sensors in the following locations (
X
in the radiator trim
R
in the front bumper
R
in the rear bumper, particularly in the middle of the rear
R
bumper
Restart the engine.
X
The display message disappears.
Display messages
page 170).
Y
page 335):
Y
261
Z