Ironically I am sitting in a Starbucks waiting for the shop to finish tinting my X5. From what I read on various sites, the tint should be non-metallic as to not interfere with the GPS. I opted to go with 40% Huper Optik all around - even over the factory privacy glass - and 30% on the pano sunroof. The car really heats up with all that glass!

As I recall from a post (from where I can't remember), there was an antenna on one of the rear windows as well. I could be totally wrong here since I didn't verify for myself.

__________________
[B]2014 Cayenne Turbo S[B]
2007 X5 4.8 - Titanium Silver , Black Leather, Premium, Prem Sound, Sport, Rear Climate, Heated Seats, Running Boards, Lux H8, GP Thunder Fogs
2003 BMW Z4 3.0si (retired)