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.
0494589 241183 Ring MW
NOTE:
(Clamping ring) Discontinued, only available via complete tool [Not available separately]