The R1 Concepts Geo-Carbon drilled and slotted rotor for 2007–2013 Mercedes-Benz S400 (USA) (rear left) is specified as a rear-left replacement rotor carrying the Geo-Carbon label and drilled-and-slotted finish. The description explicitly notes the U.S. S400 application, year range, and wheel position. The source does not include further dimensional or installation information.
R1 07-13 Mercedes-Benz S400 (USA) Rear Left Drilled & Slotted Geo-Carbon Rotor