Starting on the outside, the 2006 Mercury Mountaineer gets a revised grille, a new front bumper treatment, fresh wheel designs, and power retractable running boards that are completely hidden from sight when the doors are closed. The ribbed side cladding is ditched for a smooth, clean appearance, and bigger side mirrors improve visibility. In back, a revised tailgate is added, the tail lamp lenses are clear with red bulbs, and the bumper gets a strip of satin-silver trim. The overall effect is a more aggressive yet contemporary appearance, especially with the optional 18-inch wheels, which do a great job of filling the wheel wells.

Under the skin, the 2006 Mercury Mountaineer receives a new 4.6-liter V8 engine that whips up 292 horsepower at 5,750 rpm and 300 lb.-ft. of torque at 4,750 rpm, a significant upgrade over the old 240-horse V8. The standard 4.0-liter V6 engine continues to generate 210 horsepower for 2006, and Mercury still offers the Mountaineer with either 2WD or AWD. Additional engineering updates include a strengthened frame, as well as retuned front and more compact rear independent suspensions. The anticipated result of these upgrades is tighter handling, improved ride quality, and two rows of rear seats that fold completely flat to create a level cargo area.