Mercedes-Benz covers a wide spectrum with its M-Class sport-utilities. The ML320 delivers the rugged looks, room, safety and utility that high-end SUV buyers seek along with a V6 engine that keeps pricing down to earthly levels. The ML500 offers all that, plus considerably more oomph from its V8 engine. And the ML55 AMG hammers you with high performance. New for 2002, the 5.0-liter ML500, our test vehicle, replaces last year's 4.3-liter ML430.