How do I fix carbon buildup in my Audi A4 engine?

I've noticed that my Audi A4 engine has been struggling at low speeds and making strange sounds. After doing some research, I suspect it might be due to carbon buildup in the engine. How can I fix this issue?

One way to fix carbon buildup in your Audi A4 engine is to use a fuel system cleaner. This can help clean out any deposits and improve engine performance. I would recommend using a high-quality cleaner and following the instructions carefully.

Another option is to take your car to a trusted mechanic to have them manually clean the carbon buildup. This may be a more expensive option, but it can be more thorough and ensure that the issue is properly resolved. Make sure to do your research and find a reputable mechanic.