Which Button is for Rear Window Heating?

[LaArthur]

The REAR button can heat the side mirrors. Many car models now omit the REAR label and simply use a square icon with upward wavy lines. The rear windshield heating and defogging switch is typically located on the air conditioning control panel. The rear windshield heating and defrosting function works by embedding electric heating wires inside the rear windshield, which generate heat when powered to remove frost or fog from the glass. How to use the side mirror heating function: There are generally two ways to activate the side mirror heating function. One is combined with the electric mirror adjustment button—simply rotate the knob to turn it on. The other is located on the air conditioning control panel—press the heating button to activate it. No manual angle adjustment is needed, as the driver's side has a dedicated adjustment button. Principle of the side mirror heating function: After pressing the button, the electric heater behind the side mirror glass will rapidly heat up to a fixed temperature (usually between 35-60°C) within minutes. Heat will radiate from both left and right mirrors. Meanwhile, as the temperature rises and evaporation occurs, water droplets on the mirror surface will shrink, and fog will gradually disappear, effectively heating the mirror and removing frost or fog. If the rain is particularly heavy, its effectiveness may diminish, making the impact less noticeable. Precautions for using the side mirror heating function: The principle of side mirror heating involves embedding electric heating wires in the mirrors. These wires consume a significant amount of power. When using the heating function, ensure the car is running. Avoid activating it when the car is stationary to prevent draining the battery, which may lead to insufficient power for starting the engine. Other methods for defogging side mirrors include: Opening windows for air circulation: Crack open both side windows slightly to allow air exchange between the inside and outside of the car, reducing the temperature difference and gradually eliminating fog. Adjusting the car's air conditioning to the appropriate setting can also help by blowing warm air to remove fog.