1、Fitment: Fit for 278 Engine Model; Replacement for Benz CL550 2011‑2014; Replacement for Benz CLS550 2012‑2018; Replacement for Benz S550 2012‑2017; Replacement for Benz GLS550 2017‑2018, etc. 2、Part Number: Engine coolant thermostat housing, OEM number 2782000815 A2782000815, meets original specifications and quality standards to ensure reliable installation and use. 3、Durable Material: The thermostat housing is made of metal material, which has durability and stability, and can withstand high temperature and pressure to ensure the normal operation of the engine cooling system. 4、Maintain Proper Temp: The thermostat housing carries the coolant thermostat, which helps to control the temperature of the coolant, keeping the engine within the proper operating temperature range and preventing it from overheating or overcooling. 5、Excellent Replacement: Original standard, the manufacturing in accordance with strict OE specifications, direct replacement, perfectly fit your vehicle.