My 2002 X5 is equipped with the sliding sunroof and NOT the panoramic sunroof. Lots of reading on the pano sunroof, but info on the sliding sunroof is scarce. Electrically it will retract halfway and stop. It will not return to the closed position, let alone tilt the sunroof open. Using the manual crank I can open and close the sunroof. What's involved in getting it fully operational once again?