So I purchased a 2007 E60 550i this February with very few miles, < 6,000. The Car did not have a mark on it and of course still smelled brand new. That being said I want to keep it that way and at times it sits in the garage for weeks on end. Nevertheless when I did drive it, I could not believe just how dirty the wheels would become even after short drives in the neighborhood or driving it around the block to help dry it off after a bath. I also have an E34 in which I experienced the same issue. That particular one has very webby wheels, by that I mean many small holes in the wheel that tended to trap dirt. Nearly impossible to keep clean and very frustrating for me. So a number of years ago I replaced the Pads on the E34 with Ceramics, nothing special as I recall I purchased them at AutoZone. The results were astonishing. Granted I am picky about the appearance of my vehicles and dirty wheels are especially a concern, however the results were more than I expected. Since my E60 was even worse surrounding Brake Dust I did some research for a few weeks and decided upon the Akebono Ceramics. Incredible!! Since installation I have driven about 700 miles and have done nothing except rinse the wheels off and they have almost zero dust. With the OEM pads I would be cleaning every 50 miles. I have noticed absolutely no degradation in any braking attributes including initial bite, noise, etc. Just sharing my experience with those concerned with the appearance of their wheels or considering pad replacement. Thanks for listening.