Many drivers are unaware of an essential function of the rearview mirror, which helps prevent glare while driving at night.
Driving after dark poses different challenges than during the day.
While traffic tends to flow more freely, visibility decreases considerably, and consequently, risks increase.
One of the most common problems is glare from other cars’ headlights, which can be dangerous for drivers.
How the Car’s Secret Button Works

To counteract this problem, most vehicles have a secret button on the rearview mirror.
