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Where is the rearview mirror heating switch for the Mercedes GLB?

1 Answers

HarperMarie

07/25/25 10:53am

The rearview mirror heating for the Mercedes GLA is located above the inner door handle on the driver's side door. The heating knob switch can be rotated to three positions, with the left position being for rearview mirror heating. Rearview mirror heating is particularly useful during rainy or snowy weather. When activated, the heater behind the mirror quickly warms the surface, gradually removing rain or fog, eliminating the need for frequent manual wiping by the driver 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 turn it on. The other is located on the air conditioning control panel—press the heating button to activate it. No manual angle adjustment is needed, as there is an adjustment button on the driver's side. Principle of the rearview mirror heating function: After pressing the button, the electric heater behind the rearview mirror glass rapidly heats up to a fixed temperature within a few minutes, typically between 35-60 degrees Celsius. The heat is then emitted from the left and right rearview mirrors. Simultaneously, as the temperature rises and evaporates, water droplets on the mirror surface become smaller, and fog gradually disappears, effectively defogging and deicing the mirror. However, 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 electric heating wires embedded in the mirror. These wires consume a significant amount of power. Therefore, when using the rearview mirror heating function, ensure the car is running. Avoid activating the function while the car is stationary to prevent draining the battery and potentially leaving insufficient power to start the vehicle. Other methods for defogging rearview mirrors include: Opening windows for air circulation: Crack open the side windows slightly to allow air exchange between the inside and outside of the car. This reduces the temperature difference and gradually eliminates fog. Adjusting the car's air conditioning to the appropriate setting can also help by blowing warm air to defog the mirrors.

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