If you do a search through the forum for window tint you will find tons of pics. I tinted my X5 with 40% front passenger, 30% over the factory privacy glass. Factory privacy glass is at 35%.

http://members.dslextreme.com/users/hoiya/X5/

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[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)