This Master of Science Thesis is the result of an eight month internship in the CNH Industrial headquarter located in Turin, Italy. The main target of the work was the development of a multibody model of an on-road heavy commercial vehicle, i.e. Iveco Stralis model year 2019. The main programming environment used in this activity was MSC Adams/Car. The significance of a complete and updated multibody model is clear since it provides the starting point of several studies within the Engineering Office of the Company, for instance the handling and the comfort ones as well the extrapolation of the dynamic loads which work on the mechanical elements in order to compute their fatigue life.