51 22 004 Adjusting Rear Left Or Right Door Detent (Lock Wedges)
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2008 BMW 760Li, 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 760Li, and 2007 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.
Operation is described in "ADJUSTING LEFT OR RIGHT REAR DOOR" which is identical to: