2010 Mercedes ML-Class Owner's Manual - Page 305

What to do if ... Vehicle Problem Possible causes/consequences and M Solutions 303 The yellow fuel tank The fuel level has gone below the reserve mark. reserve warning lamp in X Refuel at the next gas station. the fuel gauge comes on while driving. Engine Problem ! (USA only) ; (Canada only) The yellow engine malfunction indicator lamp comes on when the engine is running. Possible causes/consequences and M Solutions Rthe Rthe Rthe fuel management system ignition system emission control system which affect emissions Rsystems Such malfunctions may result in excessive emissions values and may switch the engine to limp-home (emergency operation) mode. X Have the vehicle checked as soon as possible at an authorized Mercedes-Benz Center. i Some states may by law require you to visit a workshop as soon as the engine malfunction indicator lamp comes on. Check local requirements. ! (USA only) ; (Canada only) The yellow engine malfunction indicator lamp comes on when the engine is running. 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. X Check the fuel cap (Y page 210). X If it is not closed properly: Close the fuel cap. X If it is closed properly: Have the fuel system checked by an authorized Mercedes-Benz Center. Diesel engine: Your fuel tank was driven empty. X 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. Z Practical hints There may be a malfunction in