Mike, old buddy, explain to me how a car with a 84 degree thermostat runs at 80 to 82 degres? I really don't understand that. I have tested several brand new ones from the MB dealer in a pot of hot water with digital measuring equipment and find them NOT to open even at 84 degrees. Once they are open at a higher temp, how does the car run at 80 to 82 degres? This simply is not logical! The only explanation, is that your dash guage reads LOW. What do you think, Mike? I am buying a BMW 850 which runs cool all the time regardless of outside hot temp like a car should do. MB are crap! Even a Ford will run cool. Ugh!