Motorad 269-180 Engine Coolant Thermostat

Engine Coolant Thermostat for Mercedes-Benz

The Motorad Standard 269-180 engine coolant thermostat is built for Mercedes-Benz cooling systems that use a separate thermostat and housing. With a 180 degree F opening temperature, it helps regulate coolant flow for stable operating temperature in demanding driving conditions.

Motorad’s Standard line focuses on OE-style fit and function for everyday service replacement. This thermostat uses OEM-quality materials and manufacturing processes, including a copper case and wax compound for quick reaction to coolant temperature changes.

Key Features

• 180 degree F thermostat opening temperature
• Copper case with wax compound for responsive temperature control
• Jiggle pin weep hole for air bleeding during service
• Sealing flange outside diameter: 2.64 in
• Bypass diameter: 1.14 in
• Bypass length: 1.73 in
• Flange thickness: 0.06 in
• No gasket or seal included
• No installation tool included

Detailed Description

Motorad 269-180 is an engine coolant thermostat for Mercedes-Benz applications that call for a 180F replacement and a separate thermostat and housing arrangement. It is a practical choice for maintaining proper coolant circulation in models such as the Mercedes-Benz 500SL, 560SEL, and E420, where accurate temperature control is important to engine performance and cooling-system stability. This part cross-references 26980 and 9269180 for the same application.

The Standard product line is positioned as an OE-style replacement range, and this thermostat follows OEM specifications and processes to match the original cooling-system requirements. The copper case and wax element are used to react quickly to coolant temperature changes, while the jiggle pin weep hole helps purge trapped air during filling and service.

Vehicle Fitment

• Fits 1998-1999 Mercedes-Benz CL500, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1994-1999 Mercedes-Benz S420, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1994-1999 Mercedes-Benz S500, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1994-1998 Mercedes-Benz SL500, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1997 Mercedes-Benz E420, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1994-1995 Mercedes-Benz E420, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1994 Mercedes-Benz E500, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1992-1993 Mercedes-Benz 400E, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1993 Mercedes-Benz 400SEL, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1992-1993 Mercedes-Benz 500E, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1993 Mercedes-Benz 500SEC, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1992-1993 Mercedes-Benz 500SEL, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1992-1993 Mercedes-Benz 500SL, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1992 Mercedes-Benz 400SE, N/A; Temperature 180F; For Cars with Separate Thermostat & Housing; Higher Alternate Temperature Replacement; Standard
• Fits 1986-1991 Mercedes-Benz 420SEL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1990-1991 Mercedes-Benz 500SL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1986-1991 Mercedes-Benz 560SEC, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1986-1991 Mercedes-Benz 560SEL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1986-1989 Mercedes-Benz 560SL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1984-1985 Mercedes-Benz 380SE, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1984-1985 Mercedes-Benz 500SEC, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1982-1984 Mercedes-Benz 380SL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1984 Mercedes-Benz 500SEL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1982-1983 Mercedes-Benz 380SEC, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard
• Fits 1982-1983 Mercedes-Benz 380SEL, N/A; Temperature 180F; Higher Alternate Temperature Replacement; Standard

Common Cooling System Issues

• Engine running hotter than normal due to a thermostat that no longer opens at the correct temperature
• Slow warm-up or unstable coolant temperature from a worn thermostat element
• Air trapped in the cooling system after service
• Temperature control concerns on Mercedes-Benz models with separate thermostat and housing
• Replacement needs for 180F OE-style thermostat service

Installation Notes and Tips

Verify the vehicle uses a separate thermostat and housing before installation. Clean the sealing surfaces thoroughly, inspect the housing for wear or corrosion, and confirm the bypass dimensions match the original setup. Because no gasket or seal is included, reuse only if the existing seal is serviceable or replace it with the correct matching component.

Use the jiggle pin weep hole to help vent air during filling, and refill the cooling system according to Mercedes-Benz service procedures. Confirm proper coolant circulation and operating temperature after installation on Mercedes-Benz 500SL, 560SEL, E420, and other listed applications.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier, using OEM specifications and processes for consistent service replacement performance. The copper case and wax compound are selected to provide responsive temperature control in demanding automotive cooling systems.