America's least popular vehicle is comfortable and economical ... So why doesn't it sell?

You should sympathize with Fiat if this has happened to you. After an initial popularity explosion with the pint-sized, retro-styled 500 and the launch of three new versions, company executives seem more persuaded than the rest of us of Fiat's appeal. Of course, that's an average; some Fiats, like dodgeball games, are more common than others.

The adorable 500 remains Fiat's development star with a 99-day supply as of Oct.....