Dear All we sell sunroof cable puller gear, ıf you have problem with your sunroof opening or closing, this item may be a solution for everyone who have a merc. benz. the gear is made of plastic and metal, the plastic side stay in the motor, and metal side is pulling the cable. the gear will give you an economic chose, in stead of replaceing the sunroof, you will solve the problem with this sunroof gear. thank you ıf you need more information please ask more.