What are the most common maintenance issues for an Audi A6?

I have recently purchased an Audi A6 and want to ensure I am prepared to handle any potential maintenance issues. What are the most common problems that arise with this vehicle model and how can I properly maintain it?

One of the most common problems with the Audi A6 is issues with the timing belt. It is important to have the timing belt replaced at the recommended intervals to prevent any major engine damage. Additionally, be sure to only use high-quality timing belts for replacements.