I asked my independent MB shop pull my Kleen Wheels off of my SD's 15" wheels. The mechanic asked me "mind if I ask why you want those removed?" and I replied heat build up, caliper damage, warpage, etc. He seemed surprised, saying that he never heard of this.
Anyway, mine are no longer on my car, and are for sale (make offer?)... I'd rather see brake dust on my front wheels, knowing they won't fade on a fast run down a mountain, etc. Some people on the Mercedes newsgroup swear by the things, but they do admit to not pushing their cars much either.
Robert W. Roe
1984 300SD 165,911 miles
[This message has been edited by Robert W. Roe (edited 10-06-1999).]