Mercedes-Benz C-Sedan 2014 Owners Manual - Manual (Page 228)

Display messages Possible causes/consequences and M Solutions
PRE-SAFE
Functions
Currently Limited
See Operator's
Manual
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 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 AMG vehicles: ESP ® is deactivated.
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
® Brake is 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 164).
X
Clean the sensors in the radiator grill and the bumper
(
Y
page 295).
X Restart the engine.
X AMG vehicles: reactivate ESP ® (
Y
page 69).
PRE-SAFE
Functions Limited
See Operator's
Manual
PRE-SAFE ® Brake is inoperative due to a malfunction. BAS PLUS
or the distance warning signal may also have failed.
X Visit a qualified specialist workshop.
6
SRS Malfunction
Service Required
There is a malfunction in the SRS (Supplemental Restraint
System). The 6 warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
For further information about SRS, see (
Y
page 41).
226
Display messages
On-boar
d
compu
ter
and
displa
ys