Mercedes-Benz S-Class 2014 Owners Manual - Manual (Page 275)

Display messages Possible causes/consequences and M M Solutions
PRE-SAFE PRE-SAFE Functions Functions
Currently Limited Currently Limited
See Operator's See Operator's
Manual Manual
PRE-SAFE ® PLUS, PRE-SAFE ® Brake or Adaptive Brake Assist of
COLLISION PREVENTION ASSIST is temporarily inoperative.
Possible causes are:
R function is impaired due to heavy rain or snow.
R the sensors in the radiator grill and the bumper are dirty.
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.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
When the causes stated above no longer apply, the display
message disappears.
PRE-SAFE
® PLUS, PRE-SAFE ® Brake or Adaptive Brake Assist of
COLLISION PREVENTION ASSIST 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 190).
X Clean the sensors in the following locations (
Y
page 358):
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.
PRE-SAFE PRE-SAFE Functions Functions
Limited See Limited See
Operator's Manual Operator's Manual
PRE-SAFE ® PLUS, PRE-SAFE ® Brake or Adaptive Brake Assist of
COLLISION PREVENTION ASSIST is not available due to a
malfunction. BAS PLUS or the distance warning signal may also
have failed.
X Visit a qualified specialist workshop.
Display messages
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