I have a two months old A6 (2008 model) with 3600 km on it. I encountered a "Light ON" message 2-3 times since I got the car. The symptom for this "Light ON" message came on was after I shut off the engine and unplug the ignition key. One of the lights on the right side of the headlights continue to come on. The only way that I know to turn off this headlight after the message came off is to restart the engine, put the transmission in D or R, shift back to P, then turn off the engine. Anyone experience this or know what is this?