Mercedes-Benz of Melbourne and Porsche of Melbourne

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Driving Impressions

The Mercedes CLS550 is generally a joy to drive. Its 382-horsepower V8 delivers a huge dose of acceleration-producing torque at any speed. Its computer-managed air suspension scoffs at whatever the road serves up, delivering that classic Mercedes balance of ride comfort and predictable handling. This car is rock steady and inspires confidence at speeds that could earn you a nice set of handcuffs, courtesy of the highway patrol.

The CLS63 AMG goes almost like a race car and stops like a sports car. Its 6.2-liter V8 is not only blindingly quick, it's also super smooth. And it also has a racing-style dry-sump lubrication (a separate oil tank instead of the traditional oil pan at the bottom of the engine), which ensures proper oiling under extreme g-forces.

The seven-speed automatic transmission pairs with the 6.2-liter V8 to form a very impressive powertrain combination. Throttle response is instantaneous, automatic downshifts nearly so. The manual control electronics, which allow a driver to shift the transmission like a manual using either the shift lever or paddles on the steering wheel, are excellent. It allows the driver to hold a gear right at the engine's redline, where it's still silky smooth. Finally, there's a nice burbly exhaust tone at part throttle, with something more like a rebel yell when you floor it.

In the CLS63, the air suspension is tuned with a bias toward the handling side of the equation, or more firmly than some owners might like. It's also fitted with larger, Z-rated tires. In our view, it's not uncomfortable, and the payoff in improved response is worth it. Most Mercedes-Benz cars will go along for the ride when pushed, behaving predictably. The CLS63 AMG likes to be pushed. Think of it as a more willing participant in a spirited drive.

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