Warning/indicator lamps
The yellow engine diagnosis warning lamp is lit while the engine is running.
Possible causes/effects and
solutions
A malfunction has occurred in the engine, the exhaust system or the fuel system.
The emission limit values may be exceeded and the engine may be running in emergency operation mode.
Have the vehicle checked as soon as possible at a qualified specialist workshop.
Possible causes/effects and
solutions
Vehicles with a diesel engine: the fuel tank has been run dry.
Start the engine three to four times after refuelling.
If the yellow engine diagnosis warning lamp goes out, emergency operation mode is cancelled. The vehicle need not be checked.