Does the BMW 525 have a rearview mirror heating function?
2 Answers
The BMW 525 is equipped with a rearview mirror heating function. The rearview mirror heating is standard across all BMW 525 models and does not have a separate switch; it is fully automatic. The BMW 5 Series rearview mirror only heats when the automatic wiper sensor is activated. After the car is started, the rearview mirror heating function senses the temperature and automatically activates when the temperature is below 15 degrees Celsius. This function is controlled by the car's computer, which determines whether to heat the rearview mirror and to what extent based on the current outdoor temperature and whether the wipers are activated. The rearview mirror heating function is particularly useful in rainy or snowy weather. When activated, the heater behind the mirror quickly warms the mirror surface, gradually removing rainwater or fog, eliminating the need for the driver to manually wipe the mirror frequently and reducing driving hazards. How to use the rearview mirror heating function: There are generally two ways to activate the rearview mirror heating function. One is combined with the electric rearview mirror adjustment button—simply rotate the knob to activate it. 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 rearview mirror heating function: After rotating the button, the electric heater behind the rearview mirror glass quickly heats up to a fixed temperature within a few minutes, usually between 35-60 degrees Celsius. Heat will dissipate from the left and right rearview mirrors. Meanwhile, as the temperature rises and evaporates, water droplets on the mirror surface will gradually shrink, and fog will slowly disappear, 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 rearview mirror heating function: The principle of rearview mirror heating involves adding electric heating wires to the rearview mirror. These wires consume a significant amount of electricity. When using the rearview mirror heating function, ensure the car is in an ignited state. Avoid activating the function while the car is stationary to prevent draining the car battery and making it unable to provide power for starting the car. Other methods for defogging the rearview mirror include: Opening windows for airflow: Crack open both side windows slightly to allow air convection 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 use the hot air blown by the AC to defog the mirrors.
As someone who frequently drives a BMW 525, I can definitively tell you it comes equipped with heated mirrors. This feature automatically activates in low temperatures or humid weather to prevent mirror icing or fogging. It's typically integrated with the vehicle's automatic wipers or rear windshield defrost system; when temperatures drop below 5°C, the mirrors heat up to remove moisture for clearer visibility. If your mirrors dry quickly after rain while driving, that's the feature in action. BMW's thoughtful design of this detail significantly reduces safety risks in rainy/foggy conditions. For daily use, keeping mirrors clean ensures optimal heating performance. In colder regions, periodic system checks are recommended to prevent aging components from affecting functionality. While generally reliable, occasional sensor failures may cause malfunctions - simple maintenance at authorized shops can resolve this. Overall, this standard feature on the 525 greatly enhances the driving experience.
