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Display messages
Possible causes/consequences and M Solutions
The yellow ! warning lamp lights up and the red F (USA only)
or ! (Canada only) indicator lamp flashes.
It is not possible to apply the electric parking brake manually.
X
Shift the transmission to position j .
X
Visit a qualified specialist workshop.
$ (USA only)
J (Canada only)
Check Brake Fluid
Level
There is not enough brake fluid in the brake fluid reservoir. In addition,
the $ (USA only) or J (Canada only) warning lamp lights up in
the instrument cluster and a warning tone sounds.
G
WARNING
The braking effect may be impaired.
There is a risk of an accident.
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X
Secure the vehicle against rolling away (Y page 161).
X
Consult a qualified specialist workshop.
X
Do not add brake fluid. This does not correct the malfunction.
#
Check Brake Pad Wear
The brake pads/linings have reached their wear limit.
USA only: the $ red brake system warning lamp is lit while the
engine is running.
X
Visit a qualified specialist workshop.
G
Inoperative
One or more main features of the mbrace system are malfunctioning.
X
Visit a qualified specialist workshop.
Active Brake Assist
Functions Currently
Limited See Opera‐
tor's Manual
Active Brake Assist with cross-traffic function is temporarily inopera-
tive.
Possible causes are:
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.
Active Brake Assist with cross-traffic function or PRESAFE
®
PLUS is
functional 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 161).
X
Restart the engine.
254
Display messages
On-board computer and displays
256


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