Look behind the kidney grill and you can see two “automatic blinds” or air vents, this is part of BMW “Active Aerodynamics” in their Efficient Dynamics program. I got my E70 SD M Sport around the same time as Stovie yet my E70 does not have them.

More Info: http://www.xoutpost.com/x5-e70-forum/...amics-e70.html