How to Turn On the Rearview Mirror Heating in Audi A3?

[DelHarrison]

Audi A3's rearview mirror adjustment is located on the door armrest. Rotate the knob to the heating symbol to start heating. Below are the correct adjustment angles for rearview mirrors: 1. Central rearview mirror adjustment: Align the mirror parallel to the horizon, with the horizon positioned at the center of the mirror surface, occupying 1/2 of the space. The mirror should be slightly tilted towards the driver to ensure clear visibility of vehicles behind. 2. Left rearview mirror position adjustment: The horizon should appear at the center 1/2 of the mirror, with the car body occupying 1/4 of the mirror space. This adjustment allows you to see the following vehicle closely behind and also vehicles approaching from other lanes, aiding in driving judgment. 3. Right rearview mirror adjustment: Since the driver's seat is on the left, the right rearview mirror has a larger blind spot, requiring a different adjustment method from the left. Adjust the horizon to occupy 2/3 of the right rearview mirror, with the car body occupying 1/4 of the mirror space.

[LeGavin]

I remember when I first drove the Audi A3, I couldn't find the rearview mirror heating switch either. Later, I discovered it's actually quite simple. The key is the rear window defogger button on the air conditioning control panel - it's the one with a rectangle and three wavy lines. Pressing this activates the mirror heating simultaneously. It's particularly useful in cold weather; when it's snowing or frosty, just press it for seven or eight minutes and the mirrors will clear up. However, note that this function doesn't work when the outside temperature exceeds 20°C - pressing it in summer won't have any effect. My routine is to turn this on right after starting the car before fastening the seatbelt, which usually gives just enough time for the mirrors to clear before driving. When the rear window defogger is activated, the heating function starts automatically without needing any additional operation.

[LeJustin]

The operation of the rearview mirror heating in the Audi A3 is straightforward. Locate the button with a rectangular wavy line symbol in the air conditioning control area, and press it to illuminate the indicator light, which signifies activation. This function is linked with the rear window defroster, and when enabled, electric current passes through the heating wires embedded in the mirror to generate heat, capable of melting light frost or evaporating condensation. It's important to note that the heating function only operates when the ambient temperature is relatively low, automatically activating below 20 degrees Celsius. The entire defogging process typically takes about 5-10 minutes, so it's advisable to turn it on in advance during winter when fogging or icing occurs. For long-term use, regularly clean oil residues on the mirror surface to maintain effectiveness, and it's recommended to keep it on throughout rainy drives to ensure clear visibility and safety.

[VonHeidi]

Driving an A3 in the rain can be annoying with blurry rearview mirrors, but thankfully there's a heating function. Just find the button on the center console with the window and wavy lines symbol, and press it. Once during heavy rain on the highway, I activated it and clearly noticed the water droplets evaporating faster, making driving much more reassuring. Remember, when temperatures are very low, it might take a few extra minutes to take effect—don't mistake it for not working. This feature operates in conjunction with the rear window defroster, which is quite a thoughtful design. Don't worry if you can't use it in summer; keeping the mirrors clean is actually more important in daily use.

[DiAlexis]

Compared to other models I've driven, the Audi A3's mirror heating design is quite unique. It doesn't have a dedicated button but is integrated with the rear window defogger function. Pressing the wavy square button in the climate control area activates heating elements that warm the mirrors to approximately 40°C. Real-world tests show effective performance in frosty/foggy conditions, though the system automatically disables above 20°C to prevent overheating damage. Each activation defaults to a 15-minute cycle - sufficient for normal rainy/foggy conditions. Regular inspection of mirror heating filaments is recommended to prevent aging-related failures.

[MacLila]

Don't panic when you find frost on your Audi A3's mirrors in winter—the heating function is located in the rear defogger button on the AC panel. Activation requires two conditions: the engine must be running, and the temperature must be below 20°C. Pressing the switch activates heating wires behind the mirror surface, working similarly to a household heated seat cushion. Important reminder: For thick ice layers, first scrape the surface before heating, as efficiency will otherwise be very low. If it rains while driving, you can keep the function on to prevent water droplets from obstructing your vision and causing hazards. During regular maintenance, remember to have the technician check if the heating wire's resistance is within the normal range.