How do you change the thermostat of a Chrysler 300?

To change the thermostat on a Chrysler 300, first ensure the engine is cool and disconnect the battery. Remove the engine cover, if applicable, and locate the thermostat housing, typically near the upper radiator hose. Drain the coolant, then unbolt the thermostat housing, remove the old thermostat, and clean the mating surfaces. Install the new thermostat with a new gasket, reattach the housing, refill the coolant, and reconnect the battery.