2016 Mercedes Benz Sprinter 3500 fuel injected diesel V6 with 38,500 miles ,always garaged. 40 gallon fresh water,38 gallon grey and 38 gallon black tanks. Very well maintained with zero issues. new rear tires (4) and new set of Renology Lithium Batteries (2). We have driven this unit at 65mph on the highway towing a 4 door Jeep and still got 14mpg. We have upgraded to a 35 ft model and don't need two RV'S.