R1 Concepts drilled-and-slotted black rear-left brake rotor for 2020–2026 Mercedes-Benz GLS580 is specified as the rear left replacement rotor for that full-size SUV range. The product description notes drilled and slotted braking surfaces and a black finish. It restores the pad contact area for routine rear-left stopping and matches the GLS580 fitment and position listed in the description.
R1 20-26 Mercedes-Benz GLS580 Rear Left Drilled & Slotted Black Brake Rotor