sounds like a window motor/regulator problem. Most likely the motor has seized. have you been hearing any noises from the door area while operating the window recently? If all of the other windows are working, then I'd say you have a bad window motor. And NO, these are not easy to replace on E36's (to the unexperienced). I'd do a regulator and motor together while you're there.
yikes, I had a feeling you were going to ask that. I don't remember cost on parts but the labor shouldn't be any more than 2.0hr. If I had to guess I would say $300 tops (~$180 labor + ~$120 parts)????? I know that the labor shouldn't be more than 2 hrs.
im buying the motor myself and having a shop install it... the guy told me one hour....
how do i know if the motor is bad or also the regulator????
I was planing on getting a sound system installed in my car this weekend and im only getting the motor next week so will the window being stuck in the up posistion effect the installation of the speakers on that door????