Ever noticed this button in your car but never pressed it? 
The button shown is the rear window defogger/demister button.
Its primary purpose is to heat the rear window and clear condensation, mist, or frost, helping you maintain visibility in colder or wetter conditions.
But here’s something many drivers don’t know 
On many modern vehicles, especially mid-range and higher-spec models, pressing this button also activates the heated side mirrors. The mirrors are often linked to the same circuit and will warm up automatically when the rear defogger is turned on, helping to clear mist and improve visibility.
It’s a simple feature that can make a big difference when driving in foggy, rainy, or cold weather 
Next time your windows or mirrors are misty, look for this button and give it a try!
