61 13... Inline plugs, 8-, 12- pin, System D2.5
WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.
Move upper section of connector (1) and lower section of connector (2) against each other in direction of arrow.
With special tool 61 0 303 , press down retaining hook (3) of corresponding contact and pull out cable with contact.