hi everyone, got my first Smart with Edition1...…..loving it so far. Flew to LA from Houston and drove over 1,400 miles home in 36 hours with stops for gas/foods and some naps. It was over 100 degrees most of the way...….keeping steady speed at 70mph thanks to Cruise Control I can crossed my leg to be comfortable. On ascending the mountain with 100 degrees outside i noticed the coolant temperature reached 215 degrees......i got a little worry and turned of the A/C. It then dropped under 200 degrees...……...my comfort zone. I plans to do a lot of mods to the car as in LED lights/bulbs, Wheels/tires, and of course more power. I already ordered K&N filter and RACE CHIP which will add 21HP & 27TQ. Already installed the Sprint Booster to my Smart and my other 2 cars.....loving this device. Very easy to install and made the car more peppy. Thanks to all the owners that have provided info and tips as i am trying to learn more about Smart 453.