61 13... Inline plugs, 8-, 12-pin, System D2.5
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.
Move connector upper section (1) and the connector lower section (2) against each other in direction of arrow.
With special tool 61 1 132 (press-out tool) press back arrester hook (3) of appropriate contact and pull out cable with contact.