have a 11 c30,tried to open the sunroof and it opened,but wouldnt close,took the switch down and removed the motor,the gear that drives it has broken,is this part available seperately or do i need to buy the whole motor?,it is sunday here and the dealer is not open.Also does anyone know if the gear would fit from a different model?.To further add to my dilema,i have the car sold and the buyer is waiting on it?. Thanks Harvey