Motorad 868-192 Engine Coolant Thermostat Housing Assembly

Integrated Thermostat Housing for Mercedes-Benz Cooling Systems

Motorad 868-192 is an integrated engine coolant thermostat housing assembly built for Mercedes-Benz applications that require a 192°F opening temperature. It combines the thermostat, housing, sensor, seal, and cap in an OE-style layout for direct replacement service on select Mercedes-Benz S65 AMG, SL65 AMG, and Maybach models.

Key Features

• Integrated housing thermostat assembly for engine coolant control
• 192°F start-to-open temperature for OE-specified cooling performance
• Aluminum, stainless steel, and copper construction
• Rubber gasket/seal included for sealing at installation
• Two bolt holes and four outlet ports
• Silver finish with offset design and air relief valve where applicable
• Manufactured to OEM specifications and processes by an OE supplier

Product Details

The Motorad Integrated Housing Thermostat line is built for vehicles that use a combined thermostat and housing design rather than a separate thermostat service part. Part number 868-192 uses OEM-quality materials and an OE-style configuration to match the cooling system layout found on select Mercedes-Benz models. The copper case and wax compound are engineered for quick response to coolant temperature changes, helping the system regulate engine temperature consistently under demanding driving conditions. This part cross-references Dorman OE Solutions 902-5845 for the same application.

Compatible with Mercedes-Benz cooling system service on applications such as 2005-2019 SL65 AMG, 2015-2020 S65 AMG, and 2018-2020 Maybach S650. It also serves select Mercedes-Benz S600, CL600, CL65 AMG, G65 AMG, E500, SL600, SL63 AMG, S500, G500, and Maybach S600 applications listed in the fitment data. Motorad 868-192 is a direct-fit style solution for drivers searching for a Mercedes-Benz thermostat housing assembly 192°F or an OE-spec coolant thermostat housing replacement.

Common Problems This Part Can Address

• Coolant temperature regulation issues caused by a worn thermostat
• Leaks at the thermostat housing or seal interface
• Delayed warm-up from a thermostat that no longer opens at the correct temperature
• Cooling system service needs on integrated thermostat housing designs
• Fitment concerns when replacing an OE-style Mercedes-Benz coolant thermostat assembly

Installation Notes

Verify the OE-specified 192°F temperature requirement before installation. Inspect the mating surfaces, replace the seal as needed, and confirm the outlet port layout matches the original housing. This assembly uses two bolt holes and does not include mounting hardware, so reuse or source the correct fasteners separately if required by the vehicle. Confirm the vehicle application by year, make, and model before service, especially on Mercedes-Benz S65 AMG, SL65 AMG, and Maybach S650 cooling systems.

Quality Assurance

Motorad manufactures this integrated thermostat housing assembly with OEM-quality materials and OE-supplier production standards. The part is built to OEM specifications and processes for consistent fit and temperature control in demanding automotive cooling systems.