Volvo 6 Cylinder Ultra Low Sulfur Diesel 425 hp Engine, 2011 US EPA Label, Requires Diesel Exhaust Fluid, Webasto Engine Coolant Heater, Air Conditioner, Cruise Control, Power Windows, Volvo ATO2612D 12-Speed Automated Transmission, Differential Lock, 12350 lb Front Axle, 38000 lb Rears, Meritor MT-40-14X Drive Axles, 50350 lb GVWR, Air Ride Cab, High Rise Sleeper Cab, Bunk Heater, Thermo King Auxiliary Power Unit, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, Air Sliding 5th Wheel, Dual Fuel Tanks