WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. 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]