Stant 49382 Engine Coolant Thermostat / Water Outlet Assembly

Integrated Thermostat Housing for Mercedes-Benz Cooling Systems

Stant 49382 is an engine coolant thermostat and water outlet assembly built with a durable housing for long service life. The thermostat is integrated into the housing, which simplifies replacement on the vehicle and helps restore proper coolant flow control.

Compatible with select Mercedes-Benz C250, C300, SLK300, C230, E280, E300, SLK280, and C280 applications, this integrated thermostat housing is a direct-fit cooling system service part for models using a 212 Degrees thermostat setting.

Key Features

• Integrated thermostat housing assembly for streamlined service
• Durable housing material for extended use in the cooling system
• 212 Degrees thermostat calibration
• Bypass plate diameter: 1.648 in.
• Flange diameter with seal: 2.1 in.
• Flange diameter without seal: 2.26 in.
• Height from flange to bottom: 2.1 in.

Product Details

The Stant Integrated Thermostat Housing line focuses on combining the thermostat and water outlet housing into one serviceable assembly. For Mercedes-Benz cooling system repairs, that means fewer separate components to manage during replacement and a cleaner path back to proper engine temperature regulation. Stant 49382 is specified for applications requiring a 212 Degrees thermostat and is sized with the listed flange and bypass dimensions for fitment-sensitive service work. This part number, 49382, is a practical choice when replacing a worn thermostat housing on Mercedes-Benz C250, C300, and related models.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part May Address

• Coolant leaks at the thermostat housing or water outlet
• Engine running hotter or cooler than expected due to thermostat wear
• Delayed warm-up from a thermostat that no longer regulates correctly
• Cooling system service needs where the housing and thermostat are replaced together
• Fitment-sensitive replacement on Mercedes-Benz thermostat housing applications

Installation Notes and Tips

Verify the 212 Degrees thermostat specification and compare the bypass plate, flange diameter, and overall height before installation. Inspect the sealing surfaces and coolant passages for residue or damage, and confirm the replacement matches the original Mercedes-Benz application by year and model. Stant 49382 is listed for 2005-2009 Mercedes-Benz C230, 2006-2007 Mercedes-Benz C280, 2006-2008 Mercedes-Benz SLK280, 2007-2009 Mercedes-Benz E280, 2008-2009 Mercedes-Benz E300, 2008-2012 Mercedes-Benz C300, 2009-2011 Mercedes-Benz SLK300, and 2010-2012 Mercedes-Benz C250.

Quality Assurance

Stant manufactures cooling system components with application-specific dimensions and thermostat calibration to support accurate replacement selection. Part number 49382 is built as an integrated thermostat housing assembly for Mercedes-Benz cooling system service.