Ideal adjustment, longitudinal direction
WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
Open door window approximately 5 cm.
Insert the special tool 51 0 000
into the mirror triangle from above.
Raise the door window.
51 0 000
Door window glass must rest without play on special tool.
The retraction depth of the door window glass is 17 mm ± 1 mm in the area of the mirror triangle.
Courtesy of BMW OF NORTH AMERICA, INC.