Abstract: A control device for a climate control system of a motor vehicle has a temperature control for selecting the temperature of the ventilation air supplied by the system. The temperature control is operatively connected with a switch controlling an additional operating function of the climate control system, such that actuation of the temperature control to a demist temperature position actuates the additional operating function to a windshield demist mode. The demist temperature position may advantageously be the full-hot position. The windshield demist mode may include setting an air recirculation function to off, setting an air conditioning function to full cold, setting a blower speed function to maximum output, setting an air distribution function to direct a majority of ventilation air toward a vehicle windshield, and/or setting a rear window heat/defrost function to heat a rear window.