Mercedes-Benz C-Class, Owner'S Manual

Page: 326 / 489

Display messages
Possible causes/consequences and M M Solutions
Collision Preven‐ Collision Preven‐
tion Assist Plus tion Assist Plus
inoperative inoperative
COLLISION PREVENTION ASSIST PLUS is temporarily inoperative
due to a malfunction. Adaptive Brake Assist may also have failed.
X
Visit a qualified specialist workshop.
PRE-SAFE inopera‐ PRE-SAFE inopera‐
tive See Owner's tive See Owner's
Manual Manual
Important functions of PRE-SAFE ® have failed. All other occupant
safety systems, e.g. airbags, remain available.
X
Visit a qualified specialist workshop immediately.
PRE-SAFE PRE-SAFE Functions Functions
currently limited currently limited
See Owner's Manual See Owner's Manual
PRE ‑ SAFE ® PLUS or PRE ‑ SAFE ® Brake is temporarily inoperative.
Possible causes:
R
the function is impaired due to heavy rain or snow
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
Once the causes listed above no longer apply, the display message
goes out.
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 207).
X
Restart the engine.
PRE-SAFE PRE-SAFE Functions Functions
limited See Own‐ limited See Own‐
er's Manual er's Manual
PRE ‑ SAFE
®
PLUS or PRE ‑ SAFE
®
Brake is unavailable due to a mal-
function. BAS PLUS might also be deactivated.
X
Visit a qualified specialist workshop.
Display messages
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Z