The R1 Concepts drilled black brake rotor for 2014–2020 Mercedes‑Benz B Electric Drive rear right is described as the replacement rotor for that wheel position. The product notes a drilled rotor with a black finish; this unit installs on the rear right braking assembly to restore the drilled configuration specified in the description during routine brake service or part replacement.

R1 14-20 Mercedes-Benz B Electric Drive Rear Right Drilled Black Brake Rotor