How do you replace the rear window heater switch on Audi TT?

To replace the rear window heater switch on an Audi TT, start by disconnecting the car battery to ensure safety. Use a trim removal tool to carefully pry off the switch panel from the dashboard. Once removed, unplug the old switch and replace it with the new one by connecting the wiring harness. Finally, reattach the switch panel and reconnect the battery.