hi to all! I'm a new kid on the block, not only to this forum, but also to the Mercedes-Benz Diesel world. I need advise as to what needs to be done to my new baby. She was a gift from Dad and is in immaculate conditions. I am a car freak, and I love to keep my cars in tip top shape. The only problem she has right now is that the sunroof motor seeps to be slipping when either opening or closing. I usually have to help it by pushing the sunroof open or close. What should I do???