BMW will send it out to a tint shop and charge you $300 for a $100 tint job....trust me I used to have their contract here.....fing a good glass shop with someone who has been tinting for like 10 years and is very picky about his work....ask for a semi-metallic tint by either sun gard or solar gard...bother good brands....I have the solar gard endurance tint....lifetime warranty tint....since it's dyed with metal it doesn't fade....sun gard has a nice one called quantum