Door trim panels are held in place by bolt thru upper end of door handle, door lock opening trim (2 screws) and hooked plastic tabs which seat in rectangular openings in the door inner panel. After removing the hardware mentioned above, push up with firm steady pressure on the lower edge of the trim panel to release the clips. Be careful, they can be easily broken and the plastic is 12 yrs old and probably a bit brittle. As far as the moisture shield plastic is concerned, most of the time it can be reused as is, but if it loses it's tack, you can refresh it with a quick wipe of acetone, or a spray adhesive.
1987 BMW 325
[This message has been edited by jeffsr (edited 06-03-2000).]