Thermostat M654 for Mercedes-Benz

OE-spec engine thermostat assembly for Mercedes-Benz vehicles with the M654/OM654 2.0L turbo diesel engine. Restores correct warm-up time and stable operating temperature, and protects against overheating and weak heater performance.

Key Features

• Precise Temperature Control: OE-matched opening temp and flow for steady engine and cabin heat.
• Integrated Housing and Seal: Direct bolt-on replacement to minimise leaks and comebacks.
• Correct Sensor/Actuator Logic: Works with the ECU for accurate warm-up and efficiency.
• Exact Fitment: Factory mounting points for a no-mod install.

Compatibility

Common Mercedes models with M654/OM654 2.0 diesel: C-Class W205/W206 (C220d/C300d), E-Class W213 (E220d/E300d), GLC X253/C253 (GLC220d/GLC300d), GLA H247 & GLB X247 (220d trims), GLE W167 (GLE300d in some markets), and Vito/V-Class latest markets where OM654 is used. 2WD and 4MATIC where applicable — always match by VIN.

Note: Coolant, hoses, clamps, water pump, radiator, and extra sensors/hardware not included.

This is an aftermarket replacement part, not a genuine Mercedes-Benz product. Not affiliated with or endorsed by Mercedes-Benz Group AG.