Does the Mercedes-AMG GT53 4-Door really need to exist? No. Not at all. The E53 sedan and CLS53 four-door share a platform, the same turbocharged 3.0-liter straight-six engine, and mild-hybrid equipment. But not only is the GT53 the coolest looking version of the CLS/E/GT line, both inside and out, it’s also far and away the best car to drive. The handling character is perfectly dialed in, making the GT 4-Door one of the best driver’s cars around.