I have recently purchased an 01 A4. I realized that there is a power/backfeed issue somewhere. If I cut my ignition off with the headlights on the car will continue to run until you cut them off. The headlights themselves will cut off when the key is removed but the corner lights stay on and the car continues to run lol. You can also turn the ignition on with the headlight switch and in theory pop the clutch and start it. Where should I look first to fix this issue?i don't imagine it's the ignition switch since it works properly when the headlights aren't on.

 

Did you ever solve this?

 

No I sold the car, didn’t have it long enough to care lol