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Practical hints
What to do if …?
Problem Possible cause Suggested solution
? The yellow “CHECK ENGINE”
malfunction 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 engine
to its Limp-Home Mode (emergency opera-
tion).
̈ 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 pedal.
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.
The yellow fuel tank reserve
warning lamp lights up while
driving.
The fuel level has dropped below the reserve
mark.
̈ Refuel at the next gas station
(
୴ page 235).
The fuel cap not closed tight. ̈ Check the fuel cap (୴ page 235).