27/09/2008 09:22. Continuing its challenge to the Mustang for the title of "most limited-edition variants," Fiat has unveiled another special version of its 500 runabout -- the third this week. However while recent hot Cinquecentos have honored haute couture and go-fast tuning , respectively, this latest example has been created to celebrate an equally worthy subject, Formula 1 racing. // MotorTrend Magazine