Removing
Disconnect the negative cable from the battery with the ignition off.
Attention: This will erase the data from the electronic memory blocks, in particular the codes of the radio receiver.
Remove the heater control unit.
Remove the two plugs from the back of the control box.
Unscrew the switch screw, heater fan (1).
Turn the switch clockwise and remove it.
Installation
Insert the switch, turn it counterclockwise and fasten it with a screw.
Plug in the plugs and install the control unit.
Connect the negative plug to the battery.
Set the clock, if necessary, enter the security codes of the radio.