I picked up my 91 M5 today from the body shop. It's been sitting there about 6 weeks getting new paint. After driving a few miles and making a stop, the car wouldn't lock. At my next destination, the driver door wouldn't close; it wouldn't latch, it would just bounce back open. On my back to the body shop (holding the door closed while driving) I noticed that the door had latched. Anyway, now the driver door closes, but it won't lock. The lock button won't move. The key operates the passenger side doors, but not the driver side doors. I've tried the synchronization in the manual, but that doesn't help. Sometimes it gets the two rear and passenger door synchronized, but the driver door still won't lock.

Can anyone help me? Any suggestions?

Nader Ebeid