Display messages
Possible causes/consequences and MM Solutions
PRE-SAFEPRE-SAFE
Functions Cur‐Functions Cur‐
rentlyrently LimitedLimited SeeSee
Operator's ManualOperator's Manual
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 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
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 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 170).
X
Restart the engine.
X
AMG vehicles: reactivate ESP
®
(Y page 77).
PRE-SAFEPRE-SAFE
Functions LimitedFunctions Limited
SeeSee Operator'sOperator's Man‐Man‐
ualual
PRE‑SAFE
®
PLUS or PRE‑SAFE
®
Brake is unavailable due to a mal-
function. BAS PLUS with Cross-Traffic Assist may also have failed.
X
Visit a qualified specialist workshop.
250
Display messages
On-board computer and displays
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