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.
My dealership does it for $150. I have never had any issues with it... but then I don't keep a car more than 1-3 years usually