The R1 Concepts drilled black brake rotor for 2015–2021 Mercedes‑Benz C300 Coupe & Convertible rear left is specified as the replacement rear-left rotor. The description highlights a drilled, black-finished disc; this rotor installs on the rear left braking assembly to match the listed drilled configuration for that application during maintenance or component replacement.
R1 15-21 Mercedes-Benz C300 Coupe & Convertible Rear Left Drilled Black Brake Rotor