The 2008 Mercedes-Benz GL is the company's biggest SUV, a seven-passenger, full-size sport utility vehicle. The interior layout is familiar to Mercedes drivers. The second-row seats provide ample legroom. We climbed into the third row and found room for two adults to ride back there, each in a separate seat. While this is a substantially sized vehicle, it is not truck-like. The Mercedes has a much more car-like dynamic. The GL450 is more than adequate with its 335-hp V8 if towing or speed contests aren't on your agenda. The seven-speed automatic transmission helps keep the GL-Class engines operating. The GL provides more car-like dynamics than the traditional, full-size, body-on-frame SUVs from other automakers, yet can tow big trailers.