61 13... In-line plugs, 4-pin, System DFK ELA: Notes
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.
Special tools required:
Press retaining hook in direction of arrow and remove lock (1).