You will need: a special plastic mounting spatula, screwdrivers with a flat and Phillips blade.
1. Disconnect the wire from the terminal «minus» battery.
2. Remove the overlay of the control unit for the heating, air conditioning and ventilation system (see «Removal and installation of the control unit for the heating, air conditioning and ventilation system»).
3. On the inside of the control unit cover, unscrew the two screws securing the switch...
4.... and remove the switch.
5. Install the switch in the reverse order of removal.