I have an '00 S4 and this afternoon I had my buddy had the rear passenger window down. When I went to roll it up, it slammed up and then auto-rolled back down a bit. I went to roll it up and it went up a couple inches then back down a bit by itself. I rolled it down, then tried rolling it back up and it kept stuttering up and down by itself. At this point, I can't get the window up at all, but it sounds like the motor is working, but perhaps one of the window clamps or something has broken?? Can anybody offer some advice? I know I need to get the door panel off, but I don't know how to go about it. It's the middle of January and 28 degrees tonight with rain on the way tomorrow. Please help!! THANK YOU!!