Adjusting pre-tension on rear window
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.
In order to avoid wind noises, rear window (1) must be lower than roof outer skin (2).
Position special tool 51 0 010 in center of vehicle depending on dimension (A) and check underprotrusion of rear window (1).
A = 3.5 mm
X = measurement stages 1... 4 mm