61 13... Inline connectors, 15-pin, System D2.5
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2016 BMW 435i xDrive, 2016 BMW 435i, 2016 BMW 428i xDrive, 2016 BMW 428i, and 2015 BMW 435i xDrive. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
Carefully pull external connector (1) in area of retaining lugs (2) apart slightly.
Pull internal connector (3) until limit position in direction of arrow.
With special tool 61 0 303 press back retaining hook (4) of corresponding contact and pull out cable with contact.