JUST BOUGHT A C180 COUPE WITH PANARAMIC SUNROOF. SUNROOF WORKED OK UNTILL I DROVE HOME 120 MILES TRIED SUNROOF AGAIN OPENED ALL THE WAY OPEN THEN CLOSED THE ROOF BUT THE ONE CORNER OF THE ROOF IS STICKING UP ABOUT 5mm ON THE DRIVERS SIDE TRIED OPENING THE ROOF AGAIN AND THE ROOF ONLY OPENS ABOUT 100mm. ON OPENING THE ROOF AGAIN I HAVE FOUND A SMALL PIECE OF PLASTIC ABOUT 100mm LONG AND A COMPRESSION SPRING ABOUT 80mm ANY IDEAS WHERE THESE GO AND IS IT A MAJOR TASK TO FIX