Today I turned the key to have the car completely black out...no power for anything. Lights, accessories, windows, everything was out. I exited the car, engaged the alarm, disengaged it and then got back in and it started fine. Very weird....it seems like a massive power short. Now i find that the rear woofer is putting out a low frequency constantly. I think that somehow these two issues are related. Has anyone else had a problem like this?
1997 E39 540i
Any help would be appreciated....