Ideal setting in the longitudinal direction (rear window glass, fixed)

Measure distance (A) from the C-pillar cover (2) or the side window to the fixed rear door window (1).

Distance (A): 

A = 4.7 ± 0, 8 mm with C-pillar cover (2)

A = 10 mm without C-pillar cover (2)

Fig 1: Identifying Distance Between C-Pillar Cover To Fixed Rear Door Window

Courtesy of BMW OF NORTH AMERICA, INC.