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.
0494218 613330 Socket WAF 46 MP
NOTE:
(1/4 inch socket) For tightening the special nut on the EWS. Other: UK only [Released]