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What to do if …
536
Engine
Problem Possible cause/consequence Suggested solutions
±
The yellow engine malfunction
indicator lamp comes on when
the engine is running.
There may be a malfunction in:
R
The fuel management system
R
The ignition system
R
The emission control system
R
Systems which affect
emissions
Such malfunctions may result in
excessive emissions values and
may switch the engine to limp-
home (emergency operation)
mode.
X
Have the vehicle checked as soon as possible at an authorized
Mercedes-Benz Center.
i
Some states may by law require you to visit a workshop as soon
as the engine malfunction indicator lamp comes on. Check local
requirements.
±
The yellow engine malfunction
indicator lamp comes on when
the engine is running.
A loss of pressure has been
detected in the fuel system. The
fuel cap may not be closed
properly or the fuel system may
be leaky.
X
Check the fuel cap (Y page 421).
X
If it is not closed properly: Close the fuel cap.
X
If it is closed properly: Have the fuel system checked by an
authorized Mercedes-Benz Center.
Practical hints