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.
0496537 520000 Adapter cable MW
NOTE:
(Adapter cable OC3) OC3 mat in conjunction with ISTA → campaign only USA and Canada [released]