Mercedes-Benz OM460LA 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 450 hp Engine, 2007 US EPA Label, 6865 Engine hrs, Air Conditioner, Cruise Control, Engine Brake, Allison 6-Speed Automatic Transmission, Differential Lock, 16000 lb Front Axle, 40000 lb Rears, Meritor RR20-145 Drive Axles, 5.29:1 Axle Ratio, 56000 lb GVWR, Air Ride Cab, 315/80R22.5 Front Tires, 11R22.5 Rear Tires, Dual Steering Boxes, Double Frame, Hendrickson Spring over Walking Beam Suspension, 194 in Wheelbase, 126 in Cab to Axle, 178 in Cab to End of Frame