The 2013 Mercedes-Benz C-Class' ride is comfortable. Very comfortable. And quiet too — don't forget quiet. But if Cars.com reviewer Kelsey Mays were to stop there out of respect for the virtue of "If you don't have anything nice to say ... ," he wouldn't be saying much at all about the C-Class, which curiously remains a top seller despite superior sport-sedan competitors. In nearly every other category — interior space, styling, acceleration, fuel economy, brakes and handling — this last-place finisher in Cars.com's $46,000 Sport-Sedan Challenge is strictly riding on its rep, Mays says.