Mercedes-Benz has revealed its biggest and brawniest sport utility vehicle, the 2013 GL63 AMG. Making its North American debut at the LA Auto Show, Mercedes-Benz AMG chief Ola Kaellenius called this range-topping version of the GL-Class "The fastest, most powerful 7-passenger SUV in the market."

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Just how fast? How about a top speed of 174 mph and 0-60 mph time of under five seconds, both incredible figures for a full-size SUV. The heart of this all-wheel-drive luxury beast is a 5.5-liter twin-turbo V8 engine that makes 550 horsepower and 560 lb-ft of torque. The monstrous powerplant is connected to a performance-oriented version of Mercedes' 7-speed automatic transmission.

Inside, the 2013 GL63 will feature all the amenities and luxury accommodations found in its GL-Class siblings, along with unique features such as AMG Ride Control sports suspension. Further beneath the metal, a specialized transfer case for this model distributes engine power to the wheels in a 40:60 split to front and rear.

The GL63 AMG will stand out from its siblings on the outside, too. In addition to gaining the refreshed design found in other models of the GL-Class that went on sale this past summer, this AMG version is emboldened with flared fenders that increase its body width by nearly two inches and help envelope its 21-inch wheels.

The 2013 Mercedes-Benz GL63 AMG is set to go on sale in limited quantities in the first quarter of summer 2013. The vehicle will have a Manufacturer's Suggested Retail Price starting at $116,925.

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