I'm not DC, but if one or both guides (sliders, not the guide in the rear channel...that CAN'T come off) they will bind up the window travel so the motor can't overcome the friction. The motor will try to run, but can't. Same thing happens if the sliders get dried up (no grease) or the old grease gets so contaminated with dirt and corrosion they can't move. If one comes out, it throws the geometry of the regulator off so much it binds.
Quotes to live by:
guessing gets expensive
nothing is more expensive than a cheap BMW
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito)
Ken Kanne, Silverhill, AL, E36 & New Member Intro Forum Mod/Bimmerfest Tow Truck
1995 318is "Bebe"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette"
Last edited by hornhospital; 01-06-2013 at 12:26 PM.