Mercedes-Benz OM460LA 6 Cylinder 12.8 L Diesel 450 hp Engine, 2006 US EPA Label, CARB Compliant, Engine Brake, 15-Speed Manual Transmission, Differential Lock, Air Ride Cab, Aluminum Wheels, 385/65R22.5 Front Tires, 11R22.5 Rear Tires, Air Lift Pusher Axle, Air Ride Suspension, 196 in Wheelbase, Air Sliding 5th Wheel