Mercedes-Benz SLK 350 Operator's Manual page 344

Practical hints
What to do if ...
Problem
?
(USA only) The yellow engine
malfunction indicator
±
(Canada only)
lamp comes on while
driving.
Additionally you see
the message
gas cap
See Operator's
Manual in the multi-
function display.
344
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 ex-
cessive emissions values and may
switch the engine to its limp-home
(emergency operation) mode.
Your fuel tank is empty.
A loss of pressure has been detect-
Check ed in the fuel system. The fuel cap
may not be closed properly or the
fuel system may be leaking.
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 system. It allows the accu-
rate identification of system malfunctions
through the readout of diagnostic trouble
codes. It is located in the front left area of the
footwell near the hood release.
After refueling start, turn off and restart the
engine three or four times in succession.
The limp-home mode is canceled. You do not
need to have your vehicle checked.
Check the fuel cap ( page 284).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an autho-
rized Mercedes-Benz Center.