A motor vehicle wherein the combustion engine normally transmits torque to the wheels by way of an infinitely variable ratio transmission but receives torque from the wheels when the vehicle is coasting. The operator of the vehicle can manipulate one or more components (e.g., the gas pedal) of an actuating unit which includes one or more sensors arranged to monitor one or more parameters of the vehicle, and the ratio of the transmission is automatically regulated—at least temporarily—when the vehicle is coasting so that the speed of the coasting vehicle does not increase but decreases or remains unchanged. For example, one sensor can monitor the speed of the motor vehicle and another sensor can ascertain whether or not the gas pedal is depressed.