What Causes the Abnormal Noise When Folding the Mercedes Rearview Mirror?

[AlexisLee]

Mercedes rearview mirror folding with abnormal noise is generally caused by insufficient lubrication of the torsion spring inside the rearview mirror. Solution: You can remove the rearview mirror cover, spray lubricant on both ends of the spring, then manually fold and unfold the rearview mirror to see if the noise disappears. Repeat the spraying, folding, and unfolding actions multiple times until the noise is gone. Other Causes of Abnormal Noise: If the noise is a rubbing sound, buzzing sound, hissing sound, or creaking sound, it is likely due to issues with the seals at the base of the rearview mirror. There are two patterns for these noises: one occurs during hot summer weather, which is likely due to the seals expanding from the heat and insufficient lubrication; the other occurs after rain or car washing, which is usually because the car is dirty, and rain or washing causes small debris to accumulate between the rearview mirror base and the seals.