Mercedes-Benz S-CLASS 2017 Operator's Manual page 237

Display messages
Radar Sensors Dirty
See Operator's Man‐
ual
Check Left Rear
Belt See Operator's
Manual or Check
Right Rear Belt See
Operator's Manual
Possible causes/consequences and M Solutions
The radar sensor system is malfunctioning.
Possible causes are:
Dirt on sensors
R
Heavy rain or snow
R
When driving on inter-urban roads without traffic or infrastructure,
R
e.g. in desert-like areas
At least one driving system or driving safety system is malfunctioning
or is temporarily unavailable:
®
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.
A warning tone also sounds.
Once the cause of the problem is no longer present, the driving and
drive safety systems will be available again. The display message dis-
appears.
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 all sensors (
X
Y
Restart the engine.
X
The display message disappears.
The seat belt buckle extender on the right or left of the rear compart-
ment is not in the predefined position. The belt strap may be jammed
in the belt tongue.
G
WARNING
If the seat belt buckle extender is not in the predefined position, the
seat belt cannot provide the intended level of protection.
There is an increased risk of injury.
Pull over and stop the vehicle safely as soon as possible, paying
X
attention to road and traffic conditions.
Release the jamming.
X
Repeat the seat belt fastening procedure.
X
Display messages
page 162).
Y
page 323).
235
Z