Mercedes-Benz G-Class 2011 Owners Manual - Manual (Page 187)

Safety systems
Problem Possible causes/consequences and M Solutions
!
The yellow ABS warning
lamp is lit while the
engine is running. G Risk of accident
ABS (Anti-lock Brake System) is deactivated due to a malfunction.
BAS (Brake Assist), ESP
® (Electronic Stability Program), EBD
(Electronic Brake force Distribution) and 4ETS are also temporarily
unavailable.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
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.
!
The yellow ABS warning
lamp is lit while the
engine is running. G Risk of accident
The on-board voltage is too low. ABS has been deactivated due to
undervoltage.
ESP
® , BAS, EBD and 4ETS are also therefore deactivated.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
X Observe the additional display messages in the multifunction
display.
X Drive on carefully.
X Switch off consumers that are not required, e.g. the rear window
defroster or interior lighting.
ABS will be available again as soon as the vehicle's on-board
electrical system voltage increases.
If the warning lamp is still on:
X Have the battery and alternator checked at a qualified specialist
workshop.
!
The yellow ABS warning
lamp is lit while the
engine is running. You have engaged the differential locks. ABS, BAS, EBD, ESP ® and
4ETS have been deactivated.
X Disengage the differential locks.
ABS, BAS, EBD, ESP
® and 4ETS are subsequently reactivated.
Warning and indicator lamps in the instrument cluster
185
On-board computer and displays
Z