I have a 1999 E39 528. About a week ago my front passenger side door would not open from either the inside hande or the outside lock. All other doors work fine. I can hear the electronic locking mechanism working inside the door, but the door won't open. I tried removing the interior handle and manually pulling on the cable, however that didn't work. I went to the dealer who told me that they would have to pry the interior door panel off with the door closed, and said it would be a minimum of 5-6 hours and $600. Any ideas on causes or solutions to this problem would be greatly appreciated!!