I too have had the sunroof do some goofy openings, or partial openings etc when it was cold and there was someiced over conditions (frost) on the top of the car. I've read on other forums of the windows doing the same kind of thing, dealer couldn't figure it out and a battery disconnect solved the problem. These cars are definately goofy. I sure wouldn't get another based on my ownership of a purchased new 2006 Jetta. My 93 toyota truck was more reliable and trouble free.