Where is the thermostat at on 99 mercury mystic?

On a 1999 Mercury Mystique, the thermostat is located in the engine compartment, specifically at the engine's front, where the upper radiator hose connects to the engine block. To access it, you typically need to remove the upper radiator hose and the thermostat housing. It's important to ensure the engine is cool before attempting to service the thermostat to avoid burns or injuries.