6x6 is the new 4x4 at Mercedes-Benz

Perhaps they should call it the G6x63.

Mercedes-Benz has unveiled a six-wheel version of its extreme luxury off-roader, the G63 AMG.

Based on a military version of the decades-old truck that it created for the Australian army, the hand-built 6x6 has a pickup bed grafted onto its cabin to accommodate the extra axle, a total of five locking differentials, beadlock wheels and a compressed air system that allows the driver to adjust tire pressures remotely.

Power comes from the standard G63s twin-turbocharged V8, which is good for an earth-moving 536 hp, 561 lb-ft torque and not at all overkill as the vehicle weighs 8,300 pounds.

Fuel economy has not been determined, but since the 4x4 version gets 13 mpg combined, you can guess it won’t be that impressive. Two 21-gallon gas tanks should help with any range anxiety you experience.

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    U.S. sales have not been confirmed, but Autocar says Mercedes-Benz expects to build 20-30 of the monster trucks each year at a price second only to its most expensive car, the upcoming battery-powered $550,000 AMG E-Cell sports car.

    Since that one uses no fuel, consider it the world’s most expensive carbon offset for the G63 6x6.

    Test Drive: Mercedes-Benz G63 AMG