The most important and interesting thing is to find all information about your car. To find it you can see on a sticker in the spare tire place. There you will see option codes. Every code has a meaning and can tell you a lot about your Audi or any other car. A list has 11622 option codes. I have listed a part of codes here but decided to remove them because a list of some Audi option codes is huge. This website will help you a lot. Audi option codes.