How to Turn On the Rearview Mirror Heating?

[Virgil]

The method to turn on the rearview mirror heating is: 1. Start the car; 2. Press the rectangular button with a wavy line pattern located next to the exterior rearview mirror adjustment key. The function of the rearview mirror is to reflect the situation behind, beside, and below the car, expanding the driver's field of vision and reducing the occurrence of accidents. The adjustment method for the rearview mirror is: 1. Left rearview mirror: Place the horizontal line at the midline position of the rearview mirror, then adjust the edge of the car body to occupy a quarter of the mirror image; 2. Right rearview mirror: Place the horizontal line at two-thirds of the rearview mirror's position, then adjust the edge of the car body to occupy a quarter of the mirror image.

[SanGenesis]

I've been driving for over a decade and am quite familiar with the rearview mirror heating function. In most models, the heating button is hidden in the air control area, with an icon resembling a small rectangle with wavy lines, usually integrated with the rear window defroster on the same button. When I notice foggy mirrors on rainy days, pressing it activates the function. I particularly noticed while driving a Volkswagen that the heating temperature is controlled around 40°C to avoid damaging the mirror surface. It automatically shuts off after 5-10 minutes to prevent battery drain. I remember one freezing winter morning when the mirrors were frosted over, and they cleared up within three minutes of pressing the button. Some newly released electric vehicles can be set to activate automatically, for example, triggering the heating when the wipers are set to continuous mode. If you can't find the button, checking the manual in the glove compartment is the most reliable approach.

[DiRicardo]

As a novice driver, I also couldn't figure out how to turn on the heating. Later, through trial and error, I discovered the key lies in the air conditioning panel—look for that rectangular button with three wavy lines. Press it, and when the indicator light comes on, it means it's activated. Once during heavy rain, water droplets on the rearview mirror made lane changing difficult, but pressing the button and watching the water marks slowly evaporate was oddly satisfying. My current car has a smarter design; the heating automatically turns off after 15 minutes, which is said to extend the mirror's lifespan. Here's a little tip: avoid using the heating during summer rains, as high temperatures can accelerate the aging of the mirror's silver coating. The button locations vary by model—Mazda places it near the steering column, while BMW requires navigating to the comfort menu in the central control screen.

[LaBrynlee]

The most dreaded thing when driving in rainy weather is blurred rearview mirrors. From my experience, look for a rectangular button or touch icon with wavy lines in the air conditioning section of the dashboard. Pressing it activates heating elements in both mirrors, which warm up slightly above body temperature. Once during winter, I saw a neighbor pouring hot water on his mirrors to defrost them, and I quickly warned him that this could easily cause cracks. For short trips, 5 minutes of heating is usually enough to remove moisture, while for long drives, it's best not to exceed 20 minutes. In most economy cars, the button is located near the hazard lights, while luxury vehicles often integrate this feature into the electronic panel. I make it a habit to turn off the heating before parking to protect the wiring.

[LandonAnn]

The rearview mirror heating button is quite intuitive in design. On my decade-old car, the icon resembles a steaming window, located next to the defogger button. Pressing it gives a slight warmth to the mirror surface, slowing down water droplet condensation. Be cautious not to activate it after prolonged sun exposure, as thermal expansion and contraction can cause the mirror to delaminate. My relative's electric vehicle hides the heating function in a secondary menu on the central screen, requiring three taps to activate. Traditional fuel-powered cars offer easier access with physical buttons. For rainy days, using it in combination with wipers doubles the dehumidification efficiency inside and out. After washing the car, this feature is also safer than wiping with a towel for quickly drying mirror crevices.