SPIED: 2012 Mercedes-Benz ML 63 AMG with New Bi-Turbo V8

Even though the standard 2012 Mercedes-Benz M-Class is still undergoing development, the company's AMG division has began testing the high-performance version of the series.

Expected to arrive shortly after the standard M-Class model, which itself, will go on sale in late 2011, the ML 63 AMG will feature the brand's newly developed 5.5-liter twin-turbocharged V8 in place of the outgoing car's naturally aspirated 6.2-liter unit.

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Spy Video: 2012 Mercedes-Benz M-Class SUV

The countdown is on to the new Mercedes-Benz M-Class SUV that will roll out of Stuttgart sometime in the second-half of 2011. Last time we brought you some early scoop photos of the new SUV on one of its first tests on road. Now, spies have video-snagged the next M-Class during winter testing.

Sharing a platform with the new Jeep Grand Cherokee and the upcoming 2012 Dodge Durango, the M-Class will get a revised engine lineup that will most likely include a next-generation hybrid powertrain with plug-in capability.

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