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.
0492488 344000 Hexagon socket MW
NOTE:
(Hexagon socket wrench) For removing and installing the handbrake pad retaining spring and the ABS pulse sensor [Released]