Display messages
Possible causes/consequences and
M
M
Solutions
J
Check brake fluid
Check brake fluid
level
level
There is insufficient brake fluid in the brake fluid reservoir.
In addition, the red
J
warning lamp lights up on the instrument
cluster and a warning tone sounds.
G
WARNING
Braking efficiency may be impaired.
There is a risk of an accident.
X
Stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not drive on.
X
Secure the vehicle against rolling away (
Y
page 166).
X
Consult a qualified specialist workshop.
X
Do not top up the brake fluid. This does not correct the fault.
#
Check
Check brake
brake pad
pad wear
wear
The brake pads/linings have reached their wear limit.
X
Consult a qualified specialist workshop.
G
Inoperative
Inoperative
One or more main features of the Mercedes-Benz Contact system is/
are malfunctioning.
X
Consult a qualified specialist workshop.
Active
Active Brake
Brake Assist
Assist
Functions
Functions currently
currently
limited
limited See
See Owner's
Owner's
Manual
Manual
Active Brake Assist is temporarily inoperative.
Possible causes:
R
the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic 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
Once the causes listed above no longer apply, the display message
disappears.
Active Brake Assist is operational again.
If the display message does not disappear:
X
Stop the vehicle, paying attention to road and traffic conditions.
X
Secure the vehicle against rolling away (
Y
page 166).
X
Restart the engine.
Active Brake
Active Brake
Assist:
Assist: System
System inop‐
inop‐
erative
erative
Active Brake Assist is unavailable due to a malfunction. Situation-
dependent braking assistance may also have failed.
X
Consult a qualified specialist workshop immediately.
PRE-SAFE inopera‐
PRE-SAFE inopera‐
tive See Owner's
tive See Owner's
Manual
Manual
Important PRE-SAFE
®
functions have failed. All other occupant safety
systems, e.g. airbags, remain available.
X
Consult a qualified specialist workshop immediately.
Display messages
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