re: causing hell
I have a 2001 330I and it has the same symptoms as you had with your charging system. The charging system will not charge the battery and the battery light flashed on and off a few times and I too just put in a diiferant Ipod BMW cd player.
What was the problem with your car?
Thank You, Roger
PS. The battery light does not come on when the key is in the on postion.