Originally Posted by TheObviousChild
Here in the states you are allowed tint on all windows but the windshield. As far as I know, you can't get it done at the "factory", but the dealership will do it for a fee ($400 I think). The dealership does a great job though. I've had my wife's X3 done there as well as my coworker's M3.
It depends on what state you're in. In California NO tint is allowed on front windows whatsoever. I just got ticketed for it.