Just read this article... does anyone know more about these modifications due out starting in September + models? (read on Popular Mechanics website)
"Closer to reality is the new micro-hybrid-drive gasoline Smart with a stop/start system. It will be introduced into all gasoline Smart models with the exception of the tuned-up Brabus version (Europe only), beginning in September.* The new Smart diesel will be introduced in Europe this year, but probably won't make the jump over to the States." —Andrew English