Where is the rear view mirror heater on the BMW 740?

The rearview mirror heating function means that when the car is driving in rain, snow, fog, etc., the rearview mirror can be heated by the electric heating wire embedded behind the lens to ensure that the surface of the lens is clear.

Heating car rearview mirrors is generally more suitable in rainy and snowy days. When the rearview mirror is heated, the heater behind the lens quickly heats the mirror surface, and slowly removes the rain or fog on the mirror surface, eliminating the need for It eliminates the driver's trouble of frequently wiping the lenses manually, thereby reducing the risk of driving.

In fact, the working principle of electric heated rearview mirrors is very simple, and the cost is not very high. It is to install an electric heating sheet (electric heating film) in the lens of the rearview mirror on both sides. In rainy and snowy weather, When the car owner turns on the electric heating function of the rearview mirror, the electric heater will quickly heat to a fixed temperature within a few minutes, usually between 35-60 degrees Celsius, thereby heating the lens, defogging and defrosting.

Attachment: How to use the car rearview mirror heating function: The car rearview mirror heating switch is usually located next to the rearview mirror adjustment key, which is a key with a rectangular pattern and wavy lines. The specific steps to use the rearview mirror heating switch are as follows:

1. Press the car's brake pedal and prepare to turn on the power of the entire car.

2. Press the vehicle's one-button start button.

3. The car's dashboard lights up and the entire car's power is turned on.

4. Press the hot key next to the exterior rearview mirror switch to turn on the rearview mirror. After turning on the heating function of the exterior rearview mirror, the water mist on the exterior rearview mirror will slowly dissipate.