WARNING: This page is about a different car, the 2013 BMW X5 M, 2012 BMW X5 M, 2011 BMW X5 M, and 2010 BMW X5 M. 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]