The xCAR XiL application offers a model structure describing the entire vehicle for any type of powertrain, with e.g. an engine block, a battery block, an electrical block, a vehicle block, a transmission block, an energy management system block and a driver block. The interface has been created to be used not only by simulation specialists but also by calibration engineers and test bench operators. In this user-friendly interface, the needed architecture can be easily selected – combustion engine, hybrid or electric motor. It enables an online modification of the parameters for each component (gearbox, brakes, wheels, vehicle etc.) as well as importing customized RDE cycles.