Which Button is for the Rearview Mirror Heating?
2 Answers
The rearview mirror heating is the button with three curved upward arrows paired with a rectangular pattern. The rearview mirror heating function refers to when the car is driving in rainy, snowy, or foggy weather, the rearview mirror can be heated by the electric heating wire embedded behind the mirror to ensure the clarity of the mirror surface. Like the headlight washer, the exterior rearview mirror heating is a linked function. If the car is equipped with an exterior rearview mirror heating function, simply press the rear window defogging button (some models have a separate heating button). The characteristics of rearview mirror heating are: 1. On rainy or foggy days, the rearview mirror heating function can heat the electric rearview mirror; 2. There is no need to manually adjust the angle, as there is usually a control button next to the driver's seat that can adjust the angle; 3. The rearview mirror can automatically heat up, drying water droplets or snow on the mirror during rain or snow, ensuring clear visibility.
I've been driving for over a decade and often teach beginners how to identify these function buttons. The rearview mirror heating button is usually located near the driver's seat, but the exact position varies by model: some cars place it on the central AC control panel as a rectangular icon with wavy arrows (resembling steam); some German brands integrate it directly into the door panel's mirror adjustment area—just press until the light comes on; the most interesting design I've seen combines it with the windshield defogger button, activating mirror heating automatically when defogging is turned on. During rain or fog, turning it on clears moisture and frost from the heated mirror filaments in about 3 minutes—very practical. However, avoid using it immediately after washing your car or when parked outside in extreme cold, as sudden temperature changes risk cracking the mirror glass.
