Brand new and never used, directly replaces the old one and easy installation.
Fitment: for Mercedes-Benz C400 2015, for Mercedes-Benz C43 AMG 2017, for Mercedes-Benz C450 AMG 2016, for Mercedes-Benz CLS400 2015-2017, for Mercedes-Benz E400 2015-2018, for Mercedes-Benz E43 AMG 2017-2018, for Mercedes-Benz GL450 2015-2016, for Mercedes-Benz GLC43 AMG 2017-2018, for Mercedes-Benz GLE400 2016-2017, for Mercedes-Benz GLE43 AMG 2017-2018, for Mercedes-Benz GLE450 AMG 2016, for Mercedes-Benz GLS450 2017-2018, for Mercedes-Benz ML400 2015, for Mercedes-Benz SL400 2015-2016
Good Replacement: The engine's thermostat regulates the temperature of the engine by controlling coolant flow. A bad or failing thermostat: high temperature reading and engine overheating, low temperature reading and underheated engine, temperature changing erratically, coolant leaks around thermostat housing or under the vehicle. How to fine thermostat: You can find your car's thermostat by starting at the upper radiator hose and following it to where it enters the top of the engine.