What are some common engine issues in an Audi?

I have an Audi and I've been experiencing some engine problems lately. What are some potential causes for these issues and how can I prevent them?

One common issue with Audi engines is carbon build-up. To prevent this, make sure to regularly clean your engine and use high quality fuel. You can also try using a fuel additive specifically designed for removing carbon deposits.

Another potential cause is the ignition coils. They can degrade over time and cause misfires, resulting in engine trouble. It's important to have them checked and possibly replaced if necessary.