The next generation ML, the W166, is going to be upon on us soon. The ML63 AMG was recently caught testing and is shaping up quite well. Motor is reported to be the M157 twin turbo V8 putting out 544 horsepower. An optional performance package will bump it up to to around 571 horsepower and 664 pound-feet of torque. Are the X5/X6 M and the Cayenne Turbo in trouble? Maybe, Mercedes does not seem to be pulling punches.

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