I could have sworn I've read that there's a way to manually unlock your door using your key (at least I saw it for the E39, but it may also be true for the E34). I don't see how you can get the door panel off without the door open. Either way, it sucks. Sorry, man.
2006 Honda Odyssey EXL-RES
2006 Honda Accord V6 EX-L Sedan
1999 BMW 540i 6-Speed (Sold to M3UOND on 9/21/06)
1991 Honda Civic Si - Occasional Beater