Motorad 940-212 Engine Coolant Thermostat Housing Assembly

Integrated Housing Thermostat for Mercedes-Benz

Motorad 940-212 is an integrated housing thermostat assembly built for OE-style cooling system service. It combines the thermostat, housing, sensor, and gasket in one application-specific unit for select Mercedes-Benz models, including CLS500, CLS550, E550, CLK500, and CLK550.

The Motorad Integrated Housing Thermostat line focuses on OEM specifications and materials for direct-fit cooling system replacement. This Motorad 940-212 assembly uses aluminum, steel, and copper construction with a 212°F operating temperature and an included O-ring gasket for a precise seal.

Key Features

• Integrated housing thermostat assembly for engine coolant temperature control
• OE supplier manufacturing with OEM-quality materials and processes
• Copper case and wax compound for responsive coolant temperature regulation
• Silver aluminum, steel, and copper construction
• 212°F thermostat rating for specified Mercedes-Benz applications
• Includes thermostat, housing, sensor, and gasket where applicable
• One outlet port, two bolt holes, and a 1.49 in outlet diameter
• O-ring gasket included with paper gasket/seal material

Detailed Description

Motorad 940-212 is an engine coolant thermostat housing assembly engineered for select Mercedes-Benz cooling systems. It is listed for 2007-2011 Mercedes-Benz CLS500, 2007-2011 Mercedes-Benz CLS550, 2007-2010 Mercedes-Benz E550, 2007-2009 Mercedes-Benz CLK500, and 2007-2009 Mercedes-Benz CLK550. This part number is also referenced as 940-212 in OE-style interchange listings for the same application.

The integrated housing design helps simplify thermostat service by combining the housing and thermostat into one replacement unit. The copper case and wax compound support quick reaction to coolant temperature changes, while the included seal helps maintain a proper connection at the housing interface. This Motorad 940-212 is built to OE specifications for vehicles that require a 212°F thermostat setting.

This part cross-references Dorman OE Solutions 902-5184 for the same application.

Common Cooling System Issues Addressed

• Engine running cooler or hotter than specified
• Thermostat housing leaks at the seal surface
• Coolant temperature fluctuation during normal driving
• Service replacement for a worn thermostat and housing assembly
• Cooling system fault codes related to thermostat performance

Installation Notes and Tips

Verify the OE temperature rating and connector/housing layout before installation. This assembly uses two bolt holes and does not include mounting hardware or an installation tool. Clean the mating surface thoroughly, inspect the coolant passages, and replace coolant as required by the vehicle service procedure. Confirm the gasket seats evenly before tightening to specification.

Quality Assurance

Motorad manufactures this integrated housing thermostat with OEM-quality materials and OE-supplier processes to meet the demands of modern automotive cooling systems. The design follows OEM specifications for the listed Mercedes-Benz applications.