Critics derided the first generation Mercedes-Benz ML 55 as a pointless exercise. Why would anyone want a hopped up, lowered SUV on high performance tires? Nobody's wondering now since the ML 55 was a hit the day it landed in showrooms.

The ML 63 further expands the AMG portfolio to a performance vehicle the whole family can enjoy. With AMG's heavily tuned and massaged hand-built 6.3-liter V8, this 510 horsepower SUV is a force to be reckoned with. With an impressive 465 pound-feet. of torque and a seven-speed automatic transmission, the ML 63 is always a strong performer, though torque peaks at a relatively high 5,200 rpm.

The ML 63 upgrades the standard M-Class sports utility vehicles with an AMG-designed bodykit, a lowered sports suspension with active shock absorber control, AMG wheels, and numerous standard features. The AMG-calibrated Airmatic sport suspension features Mercedes' Adaptive Damping System that allows the driver to adjust the cush-versus-sport factor of the ML 63 at the touch of a button.

For 2009 onward, the ML63 sports a larger AMG grille, new fascias with a chrome lip, and new design 20-inch wheels with an AMG-branded ergonomic sports steering wheel on the inside. Bigger, 21-inch wheels and tires are available. Mercedes estimates the performance of the ML 63 at 5.0 seconds in the 0 to 62 mph sprint, and limits its top speed at 250 km/h.

That massive power is split 40/60 between the front and rear wheels, and is kept in check by specially tuned AMG brake and suspension systems.

Leather front seats with adjustable air bladders, a rearview camera, a power sunroof, a harman/kardon audio system and a power liftgate add luxury to the ML 63's interior. Factory options are limited to KeylessGo, parking assist, adaptive cruise control and heated rear seats on the $87,825 ML 63 AMG.