I believe that the rotors you will buy at the dealer are likely to be made by ATE, so the stuff of off fast lane should be the OEM stuff. Also, Pagid, Textar, ATE, and Jurid are all suppliers for MB, the dealer item pads are made by one of these companies anyway.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record