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Practical hints
What to do if ...?
Problem
?
The yellow malfunction
(USA only)
indicator lamp comes on
while driving.
±
(Canada only)
306
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 en-
gine to its limp-home (emergency opera-
tion) mode.
The fuel cap is not closed tightly.
Your gas tank is empty.
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 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 pedal.
Close 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.
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