Mercedes-Benz GLK 300 4MATIC 2012, Owner'S Manual

Page: 289 / 381

Safety systems
Problem Possible causes/consequences and M M Solutions
J
The red brake system
warning lamp comes on
while the engine is run-
ning. 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 (
Y
page 164).
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.
For this reason, BAS (Brake Assist), BAS PLUS, ESP ® (Electronic
Stability Program), PRE-SAFE
®
, PRE-SAFE
®
Brake, the HOLD func-
tion, hill start assist, the adaptive brake lights and ESP
®
trailer
stabilisation are also deactivated, 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 in an emergency braking situation can
increase.
If ESP
®
is not operational, ESP
®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
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 not be available.
286
Warning and indicator lamps in the instrument cluster
On-board
computer
and
displays