2005 Mercedes G-Class Owner's Manual - Page 292

Practical hints What to do if ... Problem Possible cause (USA only) (Canada only) The yellow engine malfunction indicator lamp comes on while driving. There is a malfunction of: The fuel management system The ignition system The emission control system Systems which impact emissions Such malfunctions may result in excessive emissions values and may switch the engine to its limp-home mode. Serious damage can occur to the emission system. Suggested solution Have the vehicle checked as soon as possible by an authorized Mercedes-Benz Light Truck 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 readout of diagnostic trouble codes. It is located near the hood lock release on the upper left of footwell. ? ± A loss of pressure has been detected in the Check the fuel cap ( page 235). fuel system. The fuel cap may not be closed If it is not closed properly: properly or the fuel system may be leaky. Close the fuel cap. If it is closed properly: Have the fuel system checked by an authorized Mercedes-Benz Light Truck Center. Your fuel tank is empty. 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. 292