Mercedes-Benz 2003 C 240 4MATIC Operator's Manual page 259

Problem
? The yellow "CHECK ENGINE"
malfunction indicator lamp
comes on while driving.
< The red seat belt warning lamp
blinks for a brief period after
starting the engine.
The yellow fuel tank reserve warning lamp
lights while driving.
Possible cause
There is a malfunction in:
The fuel management system
The ignition system
The emission control system
Systems which affect emissions
Such malfunctions may result in excessive
emissions values and may switch the engine
to its limp-home (emergency operation)
mode.
The fuel cap is not closed tight.
Your gas tank is empty.
The warning lamp reminds you to fasten seat
belts.
The fuel level has gone below the reserve
mark.
Practical hints
What to do if ...
Suggested solution
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.
Check the fuel cap.
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.
Fasten your seat belt.
Refuel at the next gas station
( page 233).
259