Adjusting the glass slide/tilt sunroof cover
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
Remove GAITER on left and right.
Close glass slide/tilt sunroof cover again (zero position).
Slacken screws (1) on left/right little by little.
Until glass slide/tilt sunroof cover (2) can still just be moved.