An input device for a control system of a vehicle includes at least one capacitive-sensing button, an actuation detection electrical circuit, a proximity sensor, a proximity temperature sensor, and a processor. In use, the capacitive-sensing button receives an actuation from a user. The actuation alters a capacitance value of the button. The detection electrical circuit comprises a threshold value and it outputs a button actuation signal when the capacitance value exceeds the threshold value. The proximity sensor generates a proximity signal when an object is provided near the capacitive-sensing button. The proximity temperature sensor provides a temperature measurement of the nearby area. The processor adjusts the threshold value to an adjustment value that is derived from the comparison signal.