2009 Mercedes CLK-Class Owner's Manual - Page 317

Practical hints What to do if ... Engine Problem ú (USA only) ± (Canada only) The yellow engine malfunction indicator lamp comes on when the engine is running. Possible cause/consequence There may be a malfunction in: RThe RThe RThe Suggested solutions X fuel management system ignition system emission control system Have the vehicle checked as soon as possible at an authorized Mercedes-Benz Center. RSystems which affect emissions 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. Such malfunctions may result in excessive emissions values and may switch the engine to limphome (emergency operation) mode. ú (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 X Check the fuel cap (Y page 227). 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. Z 315