I purchased a 2000 996 C4 a couple of months ago, and am very happy with it. However, being the pessimist that I am, I keep waiting for something to break. Well, the sunroof got stuck with the back side up

My mechanic wants $100 just to diagnose the problem

. I trust him, but don't want to put the money out right now. Is there a way that I can manually close the sunroof

I appreciate any advice or suggestions... TIA