The Brembo TY3 Sport slotted disc rotor for 2015–2019 Mercedes‑Benz GL 350 BlueTEC 4MATIC fits the rear at 345x22. With the TY3 Sport designation and a slotted face, it matches the rear rotor diameter and thickness required for those model years. It is offered as a replacement rotor to retain proper disc dimensions and the slotted braking surface on the vehicle.
Brembo 15-19 Mercedes-Benz GL 350 Bluetec 4-Matic Rear TY3 Sport Disc Rotor - 345X22