At inclusion of a heater of back glass, heaters of external rear-view mirrors also join. The current flows through heating elements in a mirror, heating up it and promoting moisture or hoarfrost evaporation.
QX4.ONLINE S40.ONLINE A-8.ONLINE W124.ONLINE RX300.ONLINE W140.ONLINE B3-B4.SPACE B3B4.SPACE A-8.SPACE