Volkswagen Repair: quarter window problem on VM beetle conv, vw service, vw beetle

Question
Hi. I have a VW Beetle Convertible 2003. The L/H rear quarter glass will not come up. All other windows and the top work as normal. What could be wrong? Should I attempt a repair? Do you know where I can buy a workshop manual for this model? Your advise Please. The VW service centre has estimated $2500 to get parts and have it fixed. Thanks. Andrew

Answer
Andrew,
 I don't have experience with this particular repair, however if it were my car you can bet I would not hesitate to tear into the problem myself, especially if the only other option is a $2500 bill.
 I recommend the Bentley manual; I have found these to be the best available.  Even at $100, I consider this a great investment if you love and want to keep your car long term.  See here:

http://www.bentleypublishers.com/product.htm?code=VNB6

Rick