67 11 560 Replacing actuator drive for rear lid lock
WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.
This operation is described in: REMOVING AND INSTALLING/REPLACING REAR LID LOCK (UPPER SECTION) .