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Practical hints
What to do if …
Problem Possible cause Suggested solution
? (USA only)
± (Canada only)
The yellow engine malfunction
indicator lamp comes on while
driving.
There is a malfunction in:
ț The fuel management system
ț The ignition system (Gasoline engine)
ț The emission control system
ț Systems which affect emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its limp-home (emergency operation)
mode.
̈ Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics system.
It allows the accurate identification of
system malfunctions through the read-
out of diagnostic trouble codes. It is lo-
cated in the front left area of the
footwell next to the parking brake.
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.
̈ Check the fuel cap.
If it is not closed properly:
̈ Close the fuel cap.
If it is closed properly:
̈ Have the fuel system checked by an au-
thorized Mercedes-Benz Center.