1. Turn on the car radio.
2. Press and hold the "SET" button until the display reads "SAFE."
3. Press the "1" button until the left-hand display reads "255."
4. Press the "3" button until the right-hand display reads "55."
5. Press the "2" button until the right-hand display reads "4."
6. Turn off the car radio.
7. Turn on the car radio again.
The display should now read the code if entered correctly. The radio code is typically a four-digit number. If the code is not displayed, you may need to contact a VW dealer or a car audio shop to retrieve it.