What are the most common issues with the Audi A7's engine?

I've noticed some strange noises coming from my Audi A7's engine. What are some common problems I should be aware of and how can I prevent them?

One common issue with the Audi A7's engine is the carbon buildup in the intake valves. This can cause misfires and reduced engine performance. To prevent this, you should use a high-quality fuel and regularly clean the intake valves.

Another common issue is oil leaks from the valve cover gasket. This can be caused by low-quality gaskets or improper installation. It's important to use original Audi parts and have them installed by a reputable mechanic.

You may also experience issues with the timing chain tensioner. This can cause a rattling noise and potential engine damage if not addressed. It's best to have this checked and replaced if needed during regular maintenance.