Operation Manual

Display messages
Possible causes/consequences and MM Solutions
Radar SensorsRadar Sensors
Dirty See Opera‐Dirty See Opera‐
tor's Manualtor's Manual
At least one of the following driving systems or driving safety sys-
tems is temporarily restricted or inoperative:
R
COLLISION PREVENTION ASSIST PLUS
R
PRE-SAFE
®
Brake
R
PRE-SAFE
®
PLUS
R
Active Lane Keeping Assist
R
Active Blind Spot Assist
R
DISTRONIC PLUS with Steering Assist and Stop&Go Pilot
If the radar sensor system in front is dirty, Active Blind Spot Assist
will not perform a course-correcting brake application.
Possible causes are:
R
the sensors in the radiator trim and/or in the bumpers are dirty.
R
the function of the driving system or driving safety system 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 or driving safety systems are
operative again.
If 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
Secure the vehicle against rolling away (Y page 170).
X
Switch off the engine.
X
Clean the sensors in the following locations (Y page 321):
R
in the radiator trim
R
in the front bumper
R
in the rear bumper, particularly in the middle of the rear
bumper
X
Restart the engine.
The display message disappears.
Display messages
251
On-board computer and displays
Z