A method for determining a temperature of a transparency variable shiftable disc and control device for the wheel and the motor vehicle

The invention relates to a method for determining a temperature (T, Tin, Tout) of a transparency variable switchable disk (11, 11 ') having a transparency variable layer (13) which (for switching of the same between two electrically conductive transparent contact layers 14, 14 ') is arranged, wherein at least one of the two contact layers (14, 14 in the process by a control device (12) of the shiftable disc (11) an electric voltage (V) to') is applied, and a is (in each case from the voltage V) resulting electric current (Iin, Iout) is determined. In this case, depending on the applied voltage (V) and the current respective resultant (Iin, Iout), a respective ohmic resistance value (Rs) and / or a combination of electrical capacitance (Cp) and the ohmic resistance value of the transparency variable layer (13) is determined and is determined therefrom by means of a predetermined assignment rule (20) at least one temperature value (Tin, Tout).