Keep it out of the canyons, and the Mercedes-Benz GL450 is lots of fun to drive. It's surprisingly nimble around town, solid and stable on broken pavement, quiet and composed on the highway. We didn't take this particular GL into the dirt, but previous experience in rain-drenched mud bogs proved adept the GL450's combination of traction control, low-range gearing, hill descent control, and height adjustable suspension. Overall, this is one SUV you'll actually look forward to driving every day.