61 13... In-line connectors, 6-, 8-pin, System MQS
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
Press lock (1) in direction of arrow and slide connector forward.
Press locking hook (2) downward and slide lock (1) out.
Press down retaining hook (1) with screwdriver and pull out cable with contact towards rear.