Rein 278 200 16 00 Engine Coolant Thermostat with Housing and Seal 103C

The Rein 278 200 16 00 is a direct OE-replacement engine coolant thermostat assembly designed for select Mercedes-Benz vehicles equipped with 4.6L and 5.5L engines. This complete assembly includes the thermostat, housing, and seal — everything needed for a proper, leak-free installation.

Rein Automotive is a brand under CRP Automotive, introduced to the North American market in 2007. The name "Rein" is the German word for "pure," reflecting the brand's commitment to quality. Rein thermostat housings are molded directly from OEM parts to meet strict factory tolerances, ensuring a precise fit and smooth installation every time.

Key Features:

• Complete assembly includes thermostat, housing, and seal
• 103°C (217°F) thermostat opening temperature
• Direct OE replacement — engineered to OE levels of form, fit, and function
• Manufactured to strict engineering standards in materials and tolerances
• Molds cast directly from OEM parts for precise fitment
• Replaces OEM part numbers: 2782000415, 2782000515, 2782000715, 2782000815

The Rein 278 200 16 00 thermostat assembly restores proper engine coolant temperature regulation, protecting against overheating and ensuring optimal engine efficiency. A reliable, cost-effective alternative to dealer-sourced OEM components.