The accelerator pedal on your smart does not have a mechanical connection to the engine. It has an electrical connection that can change with time. I was told to recalibration the pedal and I would notice that the smart would have more power and be more responsive. Well, I figured that this was country fertilizer. However, I did it and I believe it has made a difference. Mostly it seems smoother and more responsive. I believe that I saw this at
www.evilution.uk. I don't have a copy of the instructions but I believe they are as follows. I would appreciate your thoughts if you try it.
1- key in off position
2- Press the accelerator to floor and hold
3- Turn key to on position
4- Wait atleast 5 seconds
5- Turn off key and release pedal
6- Do not start the smart for atleast 60 seconds
That's it....let me know!