61 13... Inline plugs, 8-, 12-pin, System D2.5
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. 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 back retaining hook(3) of corresponding contact and pull out cable with contact.