How do the heated side mirrors in an Audi A5 work?

I've heard that the Audi A5 has heated side mirrors. As someone who has never driven in cold weather before, I'm curious about how this feature works and why it's important. Can you provide some insight?

The heated side mirrors in an Audi A5 are activated when you turn on the car's rear window defroster. This feature is important because it helps improve visibility during cold and snowy conditions.

The heated side mirrors work by using a small heating element behind the mirror glass. It's important to turn them off when not needed to prevent draining your car's battery.