Safety systems
Problem
Possible causes/consequences and
M
Solutions
J
The red brake system
warning lamp is lit while
the engine is running. A
warning tone also
sounds.
There is insufficient brake fluid in the brake fluid reservoir.
G
WARNING
The braking efficiency 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 (
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
display.
!
The yellow ABS warning
lamp is lit while the
engine is running.
ABS (Anti-lock Brake System) has been deactivated due to a fault.
Therefore, BAS (Brake Assist), COLLISION PREVENTION ASSIST,
COLLISION PREVENTION ASSIST PLUS, ESP
®
(Electronic Stability
Program), PRE-SAFE
®
, the HOLD function, hill start assist, the
adaptive brake lights and ESP
®
trailer stabilisation, for example,
are also deactivated.
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
®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X
Observe the additional display messages in the multifunction
display.
X
Drive on carefully.
X
Visit a qualified specialist workshop.
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.
256
Warning and indicator lamps in the instrument cluster
On-board computer and displays
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