In a method and a control system for acoustical function control in a motor vehicle using a speech input system that receives a spoken command and converts it into corresponding control signals, the system is activated by an operating element that is actuated manually and, upon being actuated, outputs to an operating person an indication of its readiness to receive a voice command. The indication is effected by a mechanical deflection from a preestablished position of the operating element, or a part thereof, so as to directly influence the tactile sense of the operating hand of the operating person.