Will this plug directly into my existing wiring?

Yes. This uses OEM connectors, so it plugs straight into your factory harness. No wiring modification needed.

How do I activate the heated function?

The heating element ties into your vehicle's climate controls—same switch you'd use on the original mirror. Check your owner's manual for the exact button location and operation.

Do I need any hardware or adhesive to mount this?

This mirror uses factory mounting points. You'll need the original fasteners or equivalent hardware to secure it—check what came off your old mirror first.