Mercedes-Benz 2013 GL Class - Manual (Page 320)

Problem Possible causes/consequences and M Solutions
!
The yellow ABS warning
lamp is lit while the
engine is running. ABS (Anti-lock Brake System) is deactivated due to a malfunction.
For this reason, BAS (Brake Assist), BAS PLUS, ESP
® (Electronic
Stability Program), PRE-SAFE ® , PRE-SAFE ® Brake, COLLISION
PREVENTION ASSIST, the HOLD function, hill start assist,
crosswind driving assistance and ESP
® trailer stabilization 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
affected. The braking distance in an emergency braking situation
can increase.
If ESP
® is not operational, ESP ® is unable to stabilize the vehicle.
There is an increased risk of skidding and 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
transmission, will not be available.
318
Warning and indicator lamps in the instrument cluster
On-board computer and displays