385 Practical hints
What to do if …
Problem
Possible cause/consequence
Suggested solution
ú
 (USA only)
±
 (Canada only)
The yellow engine mal-
function indicator lamp 
comes on while driving.
A loss of pressure has been detected in the 
fuel system. The fuel cap may not be closed 
properly or the fuel system may be leaky.
Check the fuel cap.
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.
Your fuel tank is empty.
After refuelling 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.