Hi, It seems the sunroof is a common problem in the MK3-MKIII VWs. I'm a novice when it comes to DYI repairs, but I've got various tools and manuals and such. But here's the problem: The roof will move up and down almost fine, but when I want it to slide back and forth it will move about half an inch and groan to a stop. It sounds almos tlike there's something lodged in there that the motor struggles against and loses. I can repeatedly push the button and it will eventually open and close. I've taken off the glass and can't see anything obviously broken or worn or bent (the motor still cannot drive the frame smoothely, so it's not like it is too weak to move the heavy glass). I imagine this has something to do with these infamous cables (which I don't know how I get access to b/c I can't see them) or the motor Any insight would be appreciated! thanks,
-George