The 1997 Z3 I just bought had sat for about a year. Naturally the battery was dead and replaced. The stock radio, C33 I believe, is completely dead. Checked the fuses including the one on the back of the radio, all good. Is there a trick I don't know about to get this radio to work again? My drivers side seat belt doesn't retract very well. Tried all the youtube tricks, none helped. Is there any information on how to get to the seat belt mechanism so I can change it? Thanks, Ray