A method for operating a driving system of a motor vehicle, in particular, the driving system having an internal combustion engine and at least one electric motor, and during warm-up of the internal combustion engine, the latter being loaded with a specifiable torque; and the at least one electric motor generating a torque at least at times, to unload or load the internal combustion engine. The cables are connectable to a free-weight assembly comprising a barbell assembly 22 or dumbbell assembly 26 to provide reciprocating vertical movement of the weight assembly in a free-weight fashion. For the aforementioned objects, the applicant provides an aqueous pigment liquid dispersion, including: C. The certificates can be distributed to entities for use in obtaining access to resources. The security pattern is provided in the security document through modifications to a color provided on the security document.