Haven't had any direct sunroof repair experience myself, but like replacing your own evaporator, there are 2 schools of thought on sunroof repairs. Some say it's just too finicky a repair if you haven't done it before, and best left to someone with experience. Others say that if you read the CD and take your time, it can be done by a patient DIY'er. It certainly depends on whether you've got broken plastic parts inside, which is a major repair, or whether you might have cable problems, which sounds to me a lot more "do-able."

I just did a search on "sunroof cable" and found some good posts on the first page of the results. Sounds like you may have a worn ferrule on the end of the sunroof flex cable, or at least to me sounded like your symptoms were similar to one of the other posters. He was able to fix the cable end for next to nothing.

__________________
Steve
'93 400E