ABSTRACT: The results of a simulation of a railway vehicle’s running behaviour are influenced by the modelling method and the detailing on the one hand and by variation of system parameters on the other hand. To compare these influences the hunting of a railway passenger coach is simulated using different model variants, which either take the structural flexibilities of the wheelsets and the track into account or neglect them; furthermore, the contact geometry and the friction coefficient in the wheel-rail contact are varied. The comparison of the results show that the impact of the structural flexibilities on the running behaviour is especially strong for high friction coefficients and for a high conicity. Furthermore the structural flexibilities can influence the limit speeds in the same range of magnitude as the variation of the friction coefficient does.