To find it, you'll likely need to consult a repair manual specific to your Sebring's engine. A Haynes or Chilton manual would be a good resource. These manuals provide diagrams and detailed instructions. Online resources, such as repair forums specific to Chrysler Sebrings, can also be helpful with pictures.
Be aware: Working on your engine's cooling system involves hot coolant. Allow the engine to cool completely before attempting to locate or replace the thermostat.