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Safety systems
Problem
J
The red brake system
warning lamp is lit while
the engine is running. A
warning tone also
sounds.
!
The yellow ABS warning
lamp is lit while the
engine is running.
Possible causes/consequences and M M Solutions
There is insufficient brake fluid in the brake fluid reservoir.
G
WARNING
Braking efficiency may be impaired.
There is a risk of an accident.
Pull over and stop the vehicle safely as soon as possible, paying
X
attention to road and traffic conditions. Do not continue driving
under any circumstances.
Secure the vehicle against rolling away (
X
Do not top up the brake fluid. Topping up will not rectify the fault.
X
Consult a qualified specialist workshop.
X
Observe the additional display messages in the multifunction
X
display.
ABS (Anti-lock Brake System) has been deactivated due to a fault.
For this reason, BAS (Brake Assist), BAS PLUS, ESP
Stability Program), PRE‑SAFE
tion, hill start assist and the adaptive brake lights are also deac-
tivated, for example.
ATTENTION ASSIST is deactivated.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance may increase in an emergency braking
situation.
®
If ESP
is not operational, ESP
There is an increased danger of skidding and risk of an accident.
Observe the additional display messages in the multifunction
X
display.
Drive on carefully.
X
Visit a qualified specialist workshop.
X
If the ABS control unit is faulty, there is also a possibility that other
systems, such as the navigation system or the automatic trans-
mission, will be unavailable.
Warning and indicator lamps
page 175).
Y
®
®
, PRE‑SAFE
Brake, the HOLD func-
®
is unable to stabilise the vehicle.
275
®
(Electronic
Z
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