Bimmer? Sorry, I should have said what kind of car it is. It's a Benz (w126 chassis). I think I actually figured it out last night, and it seems pretty easy now that I've got the sunroof out, but I have to wait until next weekend to get the "new" parts because the guy who is letting me use his parts car is out of town this weekend.

My brother has an e39 540 though...