Review on MTC 3083 103 203 07 74 Thermostat Mercedes by Rudy Santos

Media failed to load. The thermostat cover works great and is an exact OEM fit. The included air bleeder is a very useful and handy feature to remove excess air from the cooling system. When replacing the thermostat and cover, I used a new gasket from the dealer plus a few drops of red RTV sealant around the rim to ensure reliability. Then after everything had settled and dried I started the car and burped the system with the bleed screw until no more air bubbles came out, after which I sealed the whole thing with the supplied cap screw and copper crush washer. All in all a great and affordable thermostat cover that will outperform the original factory design and will work well with any applicable M104 engine.