Hi, If anyone can help me to find the code of my radio, I would really appreciate it. I had to remove the fuse to reset the frozen radio. When it came back to life, it went into the safe mode. I do not have the code because this isn;t the original factory installed radio on my A4. The dealer had replaced the radio few years ago but never gave me the code. I did not know that I needed one. Here is the serial number: AUZ5Z4A5044071. Please let me know if you need anything else.