61 13 ... In-Line Plugs, 4-, 10-Pin, System Elo
WARNING: This page is about a different car, the 2007 BMW 550i and 2006 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.
Pull connector (1) (slide) off contact carrier (2).
Hold down arrester hook (3) of defective contact and pull cable and contact up to secondary lock (6).
Hold down arrester hook once again in secondary lock and pull cable and contact completely out of contact carrier.