When a smart car is in auto mode it feels exactly like you are driving a standard. At a certain RPM throttle comes off, clutch goes in, gear changes, clutch comes out and throttle comes back on. Exactly like a standard transmission because it is a standard transmission. This was done do make more efficient power train and higher mileage. In North America people often complain about the jerky transmission when in fact it is the smoothest standard transmission on the market. Unfortunately the US market got the least fuel inefficient smart car drive train available of the 5 drive train combinations available. It is still the most fuel efficient non hybrid vehicle on the market in the US but pales in comparison to the high mpg drive trains available in Europe including the amazing 71 mpg of the little diesel like ours. Rumour has it the 1 litre used in the US was easiest to modify for the simulated "park, drive, reverse" mode required for the US market. DOT figured American drivers would not be able to figure out the forward,neutral,reverse modes. Mercedes had to figure a way to make the car "creep" when put in "drive" just like a normal automatic transmission. European smarts don't to that nor do our Canadian Diesels.