For those who would like to know more about how to maintain your Audi, check out wwww.bentleypublishers.com. They have both a CD and printed factory service manual for most Audis. You will find that they are similar, but not identical. If you purchase the CD and want the printed version as well, they offer a 50% discount on the second item. I recommend the paper copy as a first choice. It is easier to research topics and has additional information not found on the CD.