The Mercedes-AMG E53 is a successful exercise in multiple personalities. All three body styles—sedan, coupe, and convertible—share a velvety turbocharged inline-six with electric assist. Not only is this powertrain smooth and efficient, but it sends up to 429 horsepower through an equally competent nine-speed automatic transmission. Behind the engine sits a luxurious cabin anointed with premium materials and myriad options such as massaging seats and semi-autonomous driving ability. All of this rides on a standard air suspension that adjusts for supreme comfort or firm handling depending on the driving situation.