Just say no to the tint.
My previous car (540i) had tint, and it did nothing (AFAIK) to reduce the temperature inside the car. It was still boiling hot in the summer. Personally, I don't care for the look of tinted windows.
My biggest gripe with the tint was that it diminished my ability to communicate with fellow motorists. I refer to, of course, that wave of thanks when someone allows me to merge. Not the various fingers employed to express displeasure with their driving. No, not me.
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Current inventory:
F22 & G05
Cadillac CT5-V Blackwing w/3 pedals
Past: E24,E28(3),E34,E36,E37,E38(2),E39(4),E46,E89,E92 (obviously),F01,F06,F10,F30,F87,G12,G30(2),G82(2)