Mercedes-Benz S-Sedan 2015 Owners Manual - Manual (Page 281)

Display messages Possible causes/consequences and M M Solutions
PRE-SAFE PRE-SAFE Functions Functions
Currently Limited Currently Limited
See See Operator's Operator's Man‐ Man‐
ual ual
PRE‑SAFE ® PLUS or PRE‑SAFE ® Brake is temporarily inoperative.
Possible causes are:
R
function is impaired due to heavy rain or snow.
R the sensors in the radiator trim 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 sta-
tions 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 mes-
sage disappears.
PRE‑SAFE
® PLUS and PRE‑SAFE ® Brake are operational 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 192).
X
Clean the sensors in the following locations (
Y
page 363):
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 Opera‐ Limited See Opera‐
tor's Manual tor's Manual
PRE‑SAFE ® PLUS or PRE‑SAFE ® Brake is unavailable due to a mal-
function. BAS PLUS may also have failed.
X
Visit a qualified specialist workshop.
Display messages
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