I have a 2002 330ci and although the Xenon's seem to work fine, sometimes (at least once a day) the dash headlamp (right side) warning light comes on, even though the lights are turned off.
If I turn the lights on the dash warning light will go out after about 3 minutes and stay out until the car is used again without the lights. If I have used the lights continually (for example when it's dark) and the warning light has turned off, I can stop and start the car as many times as I like without the warning light coming back on.
The car has auto headlights which may/may not have anything to do with it. Has anyone experienced a similar issue or has any ideas?