2005 Mercedes-Benz CLS-class CLS55 rear.jpg

When you're out of segments to fill, create your own. Everyone who has been going ga-ga over the new CLS "four-door coupe" (basically an E-class, minus the headroom) can redirect their awe at the sheer power of – perhaps you saw this coming? – the CLS55 AMG. Similar in specs to the E55, that spells 475 horsepower from a supercharged V8. Those who know Mercedes know that in 2005, this is merely the fourth-most powerful engine in the company's vast array.