1. A simulation device for training equipment for a real ground vehicle, comprising: a vehicle model comprising a predetermined number of function models configured to simulate corresponding physical function elements of said vehicle; and arrangements for engaging physical function elements to the simulation device, wherein the simulation device is arranged such that a function model configured to simulate a corresponding physical function element is further configured to be deactivated at engagement of said corresponding physical function element and such that the function model is further configured to be reactivated at disengagement of said corresponding physical function element, allowing a user of the simulation device to use the function model of the vehicle model to simulate the physical function element while the corresponding physical function element is disengaged.