To get rid of fogging or freezing of the rear window, you need to start the engine and press the switch (type A or type B). At the same time, the indicator will light up. To turn off the heater, press the same switch again.
The rear window defroster switches off automatically about 15 minutes after being switched on. If the glass is cleared before this time has elapsed, press the button again to turn off the heater.
Attention. When cleaning the inside of the rear window, be careful not to damage the defroster's electrically conductive mesh.