Problem
Possible causes/consequences and M Solutions
!
The yellow ABS
indicator lamp is
lit while the
engine is running.
ABS is deactivated due to a malfunction or is temporarily unavailable.
ESP
®
, ASR and BAS, as well as cruise control, are also unavailable as
a result.
Self-diagnosis may not be complete, or the battery may not be charg-
ing.
G
WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock, e.g. if the
brakes are applied with maximum force.
This causes steerability and braking to be greatly impaired.
The braking distance can increase in emergency braking situations.
The driven wheels can spin when accelerating.
If ESP
®
is not operational, ESP
®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X
Drive a short distance at a speed above 13 mph (20 km/h).
The functions mentioned above are available again when the indi-
cator lamp goes out.
If the indicator lamp does not go out:
X
Drive on with care.
X
Visit a qualified specialist workshop immediately.
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The yellow DEF
indicator lamp is
lit while the
engine is running.
The exhaust gas aftertreatment is malfunctioning or the current Diesel
Exhaust Fluid (DEF) supply is limiting the vehicle range.
X
Observe the messages in the display.
h
The yellow ESP
®
indicator lamp is
lit while the
engine is running.
ESP
®
is deactivated due to undervoltage or a malfunction. As a result,
cruise control has also been deactivated.
Engine power output may be reduced.
The battery may not be being charged.
G
WARNING
If ESP
®
is not operational, ESP
®
will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
X
Vehicles with steering wheel buttons: also observe the messages in
the display (
Y page 176).
X
Drive on with care.
X
Visit a qualified specialist workshop immediately.
Indicator and warning lamps in the instrument cluster
197
On-board computer and displays
Z
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