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