WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
2318635 Adapter MW
Fig 1: Identifying Adapter (2318635)
Courtesy of BMW OF NORTH AMERICA, INC.
NOTE:
Set consisting of 2 pieces. Replaces special tool 00 6 031 [Released]