WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. 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]