Owners Manual

Problem Possible causes/consequences and M Solutions
;
The yellow
check engine
indicator lamp
lights up while
the engine is
running.
The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
After the first message and under normal operating conditions,
you can drive on for up to approximately 500 miles (800 km). Then
a warning tone sequence sounds and the engine can only be
started another 16 times.
X
Observe the messages in the display:
R
on vehicles without steering-wheel buttons (Y page 201)
R
on vehicles with steering-wheel buttons (Y page 204) and
(Y page 206).
X
Have the exhaust gas aftertreatment checked as soon as
possible at a qualified specialist workshop.
In some states it is legally prescribed that after the check engine
indicator lamp lights up you must contact a qualified specialist
workshop immediately. Observe legal requirements.
È
The yellow air
filter indicator
lamp lights up
while the engine
is running.
The service limit for the air filter has been reached. The air filter
is dirty.
X
Have the air filter element replaced as soon as possible at a
qualified specialist workshop.
h
The yellow tire
pressure
monitor warning
lamp comes on.
G
Risk of accident
The tire pressure monitor indicates a rapid or severe loss of
pressure in at least one tire.
X
Stop the vehicle without making any extreme steering
maneuvers or braking suddenly. Pay attention to the traffic
conditions while doing so.
X
Check the tires and correct the tire pressure. If a tire continues
to lose pressure, it must be replaced. Replace damaged tires
immediately.
The warning lamp goes out after you have been driving for a few
minutes with the malfunction rectified.
X
On vehicles with steering wheel buttons, also observe the
messages in the display (Y page 199).
Troubleshooting
197
Practical advice
Z