61 13... In-line plugs, 2-pin, System MDK 3 plus 2.8
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:
Unlock lock (1) on outside at retaining hook and slide out lock (1) to side.
With special tool 61 0 316 (61 1 136), unlock contact and pull out cable with contact (1) towards rear.