Car: 2005 BMW X5 4.8is Service: Intensive Wheel Clean Comments: - Front wheels show bad brake dust build up and tar marks - Stubborn contaminants don't come out with a simple wheel cleaner. - Solution is simple = Clay bar! The car will be in for a full exterior and interior detail later on next year. I know many people experience this issue with their wheels, so that is how you solve the problem. Enjoy the before and after photos below! Before - notice the areas I've wiped off