Rein CTI0019 Engine Coolant Thermostat

OE Thermostat Insert for Mercedes-Benz Cooling Systems

Rein CTI0019 is an OE quality engine coolant thermostat insert built for direct replacement service in select Mercedes-Benz applications. It is calibrated to open at 80 degrees Celsius to help maintain stable operating temperature in the cooling system.

Designed for Mercedes-Benz E420, S420, S500, SL500, E500, 400E, 400SEL, 500E, 500SEC, 500SEL, 500SL, 400SE, 420SEL, 560SEC, 560SEL, and 560SL applications, this thermostat insert follows original equipment design specifications for fit and function.

• Matches original equipment design specifications
• Supplied with all gaskets or seals necessary for installation
• Built to strict engineering standards for materials and tolerances
• Temperature calibrated to 80 degrees Celsius for consistent engine cooling control
• High-quality metal and plastic construction for durability and service life

Detailed Product Overview

The Rein CTI0019 thermostat insert is made as a direct OE-style replacement for Mercedes-Benz cooling system service. Rein uses quality metals and components to support dependable operation, while the calibrated opening temperature helps the engine reach and maintain the proper running range. This part cross-references Mercedes-Benz 1162000315 for the same application.

Use CTI0019 when servicing a Mercedes-Benz thermostat housing or replacing a worn thermostat insert on compatible E-Class, S-Class, and SL-Class models from the 1986-1995 model years. The part number CTI0019 is also useful when searching for an OE quality thermostat insert for Mercedes-Benz cooling repair.

Common Cooling System Issues

• Engine running too cool or too warm
• Temperature fluctuations during driving
• Delayed warm-up after cold starts
• Cooling system service on a leaking or aging thermostat insert
• Restoring proper coolant flow control in Mercedes-Benz E420, S500, and 560SL applications

Installation Notes and Tips

Verify engine number notes before ordering, since several Mercedes-Benz applications list cutoff engine numbers. Confirm the thermostat insert matches the original housing design and inspect the sealing surfaces before installation. CTI0019 is an application-specific part, so matching the vehicle year, model, and engine number is important for correct fitment.

• Fits 1994-1995 Mercedes-Benz E420, N/A, to Eng. No. 020771
• Fits 1994-1995 Mercedes-Benz S420, N/A, to Eng. No. 026750
• Fits 1994-1995 Mercedes-Benz S500, N/A, to Eng. No. 056885
• Fits 1994-1995 Mercedes-Benz SL500, N/A, to Eng. No. 013777
• Fits 1994 Mercedes-Benz E500, N/A, to Eng. No. 010204
• Fits 1992-1993 Mercedes-Benz 400E, N/A, to Eng. No. 020771
• Fits 1993 Mercedes-Benz 400SEL, N/A, to Eng. No. 026750
• Fits 1992-1993 Mercedes-Benz 500E, N/A, to Eng. No. 010204
• Fits 1993 Mercedes-Benz 500SEC, N/A, to Eng. No. 056885
• Fits 1992-1993 Mercedes-Benz 500SEL, N/A, to Eng. No. 056885
• Fits 1993 Mercedes-Benz 500SL, N/A, to Eng. No. 013777
• Fits 1992 Mercedes-Benz 400SE, N/A, to Eng. No. 026750
• Fits 1990-1992 Mercedes-Benz 500SL, N/A
• Fits 1986-1991 Mercedes-Benz 420SEL, N/A
• Fits 1986-1991 Mercedes-Benz 560SEC, N/A
• Fits 1986-1991 Mercedes-Benz 560SEL, N/A
• Fits 1986-1989 Mercedes-Benz 560SL, N/A

Quality Assurance

Rein OE quality thermostat inserts are engineered to meet or exceed original equipment material standards and are temperature calibrated for consistent response in the cooling system. The brand’s OE-style construction supports reliable service life for professional repair work and routine maintenance.

Search CTI0019 when you need a thermostat insert for Mercedes-Benz E420, S500, or 560SL cooling system repair.