Hey, I've got sum sunroof trouble. i were cleaning the 4 drain hoses on my 89 520i and took the sunroof off 2 get better access 2 them. I then noticed that the wee plastic slider tht opens and closes the sunroof, the plastic part which has the wire attached to it that enables the sunroof to open and close has boke in 2, now i can't open or close the sunroof as this part has snapped. How do i fix this ? do i need to take it 2 the dealership 2 get it fixed or can i do it myself?

many thanks