Install the bellows for the glass slide/tilt sunroof

NOTE: Description is for right component only. The procedure on the leftside is identical.

Shift the glass slide/tilt sunroof panel to the vent position.
Carefully screw in the bellows (1) into the bottom guide.
Carefully screw the bellows (1) into the top guide.
Check the bellows (1) is seated securely.

Courtesy of BMW OF NORTH AMERICA, INC.