Which button is for the Mercedes-Benz mirror heating?
3 Answers
It is combined with the REAR button for rear window heating, which simultaneously heats the side mirrors. 1. Introduction: In rainy or snowy weather, when the car mirror heating switch is pressed, the indicator light on the button will illuminate. The heating element will quickly warm up to a fixed temperature within a few minutes, typically between 35-60 degrees Celsius. Steam will rise from both side mirrors, and the water droplets on the mirror surface will gradually evaporate as the temperature rises, while the fog will slowly disappear. This achieves the effect of heating the mirror, defogging, and defrosting. 2. Precautions: After activating the mirror heating function, the defogging and defrosting effects are not immediate. It takes some time for the frost and fog to gradually dissipate after preheating. Excessive use of this function, especially when each session exceeds 30 minutes, can affect the lifespan, clarity, and luminosity of the mirrors.
I've been driving a Mercedes for several years and often encounter foggy mirrors during rainy or snowy weather. The heating button is actually very easy to find - it's integrated with the rear window defogger button on the climate control panel, usually labeled "REAR" or marked with a three-wave-line icon. When pressed, both the mirrors and rear window will heat up simultaneously. The indicator light shows it's working, and the mirrors clear up within minutes. If there's no response, it might be because the external temperature isn't low enough (the system only activates automatically below freezing), or you may need to check the fuse located in the engine compartment fuse box. This design is very thoughtful, reducing interior button clutter while remaining convenient and safe to operate. I've found this feature significantly improves visibility in rain or snow, helping prevent rear-end collisions or scrapes, especially useful during highway driving. Whenever I encounter foggy conditions, I simply press that button - no complexity or specialized knowledge required. If the button position differs, check your vehicle manual for confirmation; it's usually in a prominent location.
From Mercedes-Benz's design logic, the heated mirror button usually shares the same key with the rear window defogging function, primarily to simplify driving operations and enhance safety. That button is located in the air conditioning control area of the center console, typically labeled "REAR" or with a wavy symbol. A light press will simultaneously power the heating for both the rear window and mirrors, using built-in heating wires to remove fog and frost. A small indicator light on the button will illuminate to show activation; it only works automatically under low-temperature conditions and may not function on very hot days to prevent system overheating. In my experience, the effect is quick—rainy-day fog dissipates in just a minute or two. If the button fails, the cause could be a blown fuse or poor contact—check the fuse box, usually located near the engine compartment. This integrated approach is quite scientific, avoiding driver confusion over multiple buttons while also reducing energy consumption. Keeping the area around the button dry during maintenance can extend its lifespan—the design is practical and easy to understand.
