The R1 Concepts drilled black brake rotor for 1998–2005 Mercedes‑Benz ML320 rear left is identified as the replacement rear-left rotor. The description calls out a drilled, black-finished disc for that position; this rotor installs on the rear left braking assembly to match the listed drilled configuration when performing brake repairs or replacing the rotor on the specified vehicles.
R1 98-05 Mercedes-Benz ML320 Rear Left Drilled Black Brake Rotor