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Practical hints
What to do if …
Problem Possible cause Suggested solution
? The yellow “CHECK ENGINE” mal-
function indicator lamp comes on
while driving.
There is a malfunction in:
ț The fuel management system
ț The ignition system
ț The emission control system
ț Systems which affect emissions
Such malfunctions may result in excessive
emissions values and may switch the en-
gine to its limp-home (emergency opera-
tion) 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 sys-
tem. It allows the accurate identifica-
tion of system malfunctions through
the readout of diagnostic trouble
codes. It is located in the front left
area of the footwell next to the park-
ing brake.
The fuel cap is not closed tightly. ̈ Check the fuel cap.
Your gas tank is empty. ̈ After refuelling, start the engine three
or four times in succession.
The limp-home mode is canceled. You do
not need to have your vehicle checked.