61 13... Circular connector, 13-pin, system D2.5
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 335is, 2013 BMW 335i, 2012 BMW 335is, 2012 BMW 335i, and 2011 BMW 335is. However, it is still accessible from the selected car via links, so may be relevant.
Pull off rubber grommet (1).
Carefully pull out lock (2) in direction of arrow.
Move lower section of connector (3) in direction of arrow until retaining lugs (4) snap into release groove (5).
With special tool 61 0 303 , press down retaining lugs (6) of corresponding contact and pull out cable.