Mercedes-Benz 2013 GLS Class - Manual (Page 297)

Problem Possible causes/consequences and M Solutions
!
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 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.
Warning and indicator lamps in the instrument cluster
295
On-board computer and displays
Z