This 5-passenger, body-on-frame 4-dr wagon was designed by Mercedes-Benz for the German army in the 1970s and recently adapted for the U.S. as a luxury SUV. "G" denotes the German term Galaendewagen--cross-country vehicle--and a tall, relatively narrow build reveals an all-terrain orientation. Two G-Class models are offered. The G500 has a 292-hp 5.0-liter V8. The G55 AMG from Mercedes' performance division has a 349-hp 5.4-liter V8. Both have a 5-speed automatic transmission, antiskid/traction control, antilock 4-wheel disc brakes with brake assist, and all-wheel drive with low-range gearing. Designed for severe off-road use, the AWD system allows on-the-fly low-range engagement up to 15 mph, and includes locking front, center, and rear differentials. Side and curtain airbags are unavailable. Both models come with 18-inch alloy wheels, sunroof, wood/leather interior trim, heated front and rear seats, and Mercedes' assistance and navigation systems. The G55 adds wider tires, side-exit exhaust, fender flares, front brush bar, rear chrome load steps, unique gauges, and uprated leather trim.