The R1 Concepts drilled black brake rotor for 2003–2006 Mercedes‑Benz CL500 (rear left) is specified as the rear-left replacement rotor for those years. The description notes a drilled surface and black finish, marking this part as the identified rotor option for rear-left brake replacement and maintenance on applicable CL500 model years.
R1 03-06 Mercedes-Benz CL500 Rear Left Drilled Black Brake Rotor