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.
2327752 Crimping tool MW
Fig 1: Identifying Crimping Tool (2327752)
Courtesy of BMW OF NORTH AMERICA, INC.
NOTE:
Basic pliers (e.g. in conjunction with die 54 0 230 for crimping the cables on the soft top in E93) [Released]