By following these steps, you can resolve 90% of RCD 300 freezes and "SAFE" lockouts without a trip to the dealer.
Use this if the screen is frozen, buttons don't respond, or "SAFE" is flashing but you haven't entered a code yet. how to reset vw volkswagen rcd 300 radio top
Disconnect the negative terminal of your car battery for 5 minutes. By following these steps, you can resolve 90%