Hello, I pull a 6000 lb GVWR travel trailer to Florida and Wisconsin every season and searched many months for the right tow vehicle. Had to be a diesel for low rpm torque and pulling ability at low (relaxing) rpm. The HD pickups were too big, tall and truck like. Finally bought a 2 year old MB ML320 cdi SUV in 2009. It easily pulls my trailer while returning between 14 and 18 mpg (actual measured) with the cruise set at 60 on interstates even in the mountains. I love the turbo diesel with the 7 speed auto but have had lots of electrical glitches and problems. Very interested in the Ram Diesel, future 5 cyl Colorado diesel, Ford Transit 5 cyl diesel van and hopefully others. next......maybe a hybrid diesel electric!!! Happy the government pushed these guys to vastly improve fuel mileage!