The BMW 525 is equipped with a heated mirror function. The heated mirrors are standard across the entire BMW 525 series and do not have a separate switch; they operate automatically. The heated mirrors in the BMW 5 Series only activate when the automatic wiper sensor is turned on. After the car starts, the heated mirror function senses the temperature and automatically activates when the temperature drops below 15 degrees Celsius. This feature allows the computer to determine whether to heat the mirrors and to what extent based on the current outdoor temperature and whether the wipers are turned on. The heated mirror function is particularly useful during rainy or snowy weather. When activated, the heater behind the mirror quickly warms the surface, gradually removing rainwater or fog, eliminating the need for the driver to manually wipe the mirrors frequently, thereby reducing driving hazards. How to use the heated mirror function: There are generally two ways to activate the heated mirror 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. There is no need to manually adjust the angle, as the driver's side has an adjustment button. Principle of the heated mirror function: After pressing the button, the electric heater behind the mirror glass rapidly heats up to a fixed temperature within a few minutes, typically between 35-60 degrees Celsius. Heat is then emitted from the left and right mirrors. Simultaneously, as the temperature rises and evaporation occurs, water droplets on the mirror surface become smaller, and fog gradually dissipates, thereby heating the mirror and removing frost. If the rain is particularly heavy, the effect may diminish and become less noticeable. Precautions for using the heated mirror function: The principle of the heated mirror involves adding electric heating wires to the mirror. These wires consume a significant amount of electricity. When using the heated mirror function, ensure the car is in an active state. Avoid activating the heated mirrors when the car is stationary to prevent draining the battery and leaving insufficient power to start the car. Other methods to defog mirrors include: Opening windows for air circulation: Crack open the side windows slightly to allow air to flow between the inside and outside of the car, reducing the temperature difference and causing the fog to gradually disappear. Adjusting the car's air conditioning to the appropriate setting can also help by blowing warm air to defog the mirrors.
