Muscle arrives in the form of the now-familar twin-turbocharged 5.5-liter V8, which replaces the naturally aspirated 6.2-liter V8. No need to complain, as the boosted engine produces 518 horsepower and 516 pound-feet of torque (opt for the AMG Performance Package and buyers will receive 550 horsepower and 560 pound-feet of torque). With a standard Mercedes-Benz AMG Speedshift Plus seven-speed transmission, the all-wheel-drive SUV will hit 60 miles per hour in just 4.7 seconds. Funk Flex

We’ve known for quite some time that Mercedes-Benz is prepping a hardcore AMG variant of its new-for-2012 M-Class crossover, and according to Car and Driver, it appears that the production model will debut next month at the Los Angeles Auto Show. Funk Flex