A method of operating a drive train of a motor vehicle which includes at least an electric machine, as a drive aggregate, and a transmission which is positioned between the drive aggregate and an output, and a starting element positioned between the electric machine and the transmission. After the adjustment phase, a working phase takes place in which the filtering device carries out its filtering function. The sensor includes a structural component comprising a substrate and a compliant layer, a magnetic-to-mechanical converter coupled to the structural component to provide a mechanical indication of the magnetic field. The video module is electrically connected to the first expansion interface of the hub module through the first connection interface.