To be clear, the car has a gas pedal. The car operates much like an automatic. The difference is how the car shifts, internally there is a big difference, but if you just put it in "D" and go, the difference is slim. Automatics have gears and bands that do the shifting, the smart has gears and clutches, both are automatically operated for you. Just as you can shift an automatic from 1, 2, 3, D, so can you in a smart (except the smart goes from 1 - 5) if you want to, again, no clutch. Not sure if that helps, but thats the best I can do without getting technical.