The G-Class is powered by a 382-horsepower, 5.5L V8, while the high-performance G55 AMG gets a supercharged version good for 500 hp. The G55 can dash to 60 mph in just 5.4 seconds, according to Mercedes-Benz. Fuel economy isn't stellar, but it's reasonable considering what the G-Class was built for: 12 mpg city and 15 highway. The AMG version achieves 11 city and 13 highway.
Thanks to a serious mechanical 4-wheel-drive system, complemented by modern electronics, the G-Class has the goods for serious off-roading as well as simply taking on slippery road conditions. The system comes with three differential locks to distribute power in whatever way is best for the conditions. On- or off-road, traction is aided by the electronic stability control system, which also helps distribute power left to right.
The G-Class is an old-style, truck-like SUV in look and feel, yet its interior is appointed with top-notch luxury materials, including premium leather, burl walnut trim and wood and leather trim elsewhere. The G55 AMG adds a Nappa leather interior and natural maple trim, plus 5-spoke wheels, special chrome trim, and illuminated doorsills on the outside.
Inside, the G-Class provides a very upright driving position that's quite different than in any other vehicle from the brand's lineup; back seats have enough room for adults, but they're not as easily reconfigurable for cargo compared to most modern SUVs. Also, the back door is hinged on the side rather than the top.
Cruise control, a dual-zone automatic climate control system, rear heated seats and a parking assistant are included with the G550, as well as a heated steering wheel and heated and ventilated multi-contour front seats. The latest version of Mercedes-Benz COMAND screen-based interface is included on the G55 AMG, plus voice controls, a Bluetooth hands-free calling interface. There's also a premium, 610-watt harman/kardon audio system that also features an SD memory card slot, iPod connectivity and Sirius satellite radio and HD radio tuners. The navigation system includes a 40-GB hard drive as well as live traffic info and Zagat restaurant ratings
