Mercedes-Benz R-Class Owner's Manual page 284

Indicator and warning lamps in the instrument cluster
Problem
- The yellow ABS warning
lamp comes on while the
engine is running.
- The yellow ABS warning
lamp comes on while the
engine is running.
Possible cause/consequence
G Risk of accident
ABS has been deactivated due to
a malfunction. Therefore, Brake
Assist, ESP ® and PRE-SAFE ® are,
for example, also deactivated.
The brake system continues to
function normally, but without
electronic support. The wheels
could therefore lock if you brake
hard, for example.
G Risk of accident
ABS has been deactivated due to
undervoltage. It is possible that
the battery is not being charged.
Therefore, the following systems
are, for example, also deactiva-
ted: Brake Assist, ESP ® , BAS and
®
PRE-SAFE .
The brake system continues to
function normally, but without
electronic support. The wheels
could therefore lock if you brake
hard, for example.
Suggested solutions
Drive on carefully.
X
Observe the additional messages in the multi-function display
X
( page 255).
Y
Visit a qualified specialist workshop as soon as possible.
X
Switch off consumers that are not required, e.g. reading lamps,
X
interior lighting, etc.
ABS will be available again as soon as the vehicle's electrical sys-
tem voltage increases.
Practical advice
Troubleshooting
Z
281