Brake dust
Anyway, I have found that if you wax your wheels with a fine coat of turtle wax or the like, you can lengthen the time between wheel washings. We used to put after-market dust covers on our older Benzes, but we stopped doing that, and I'm not quite sure why, I think because nothing really helped.
Like poor AM reception, I have come to realize that the dust is just something you have to live with.

good luck , j.
and up till now...my E500 only 3rd day in use..the front and back wheels are already starting to gather brake dust on them. but they stop great! unlike the LS400 which is a farther not secure reach imo.



