How to troubleshoot technical issues with my Audi's engine?

My Audi's engine seems to be making strange noises and the performance has decreased. How can I identify the root cause and fix the issue?

First, check the vehicle's manual and locate the engine components. Then, visually inspect the engine for any noticeable leaks or damages. Next, use a diagnostic tool to scan for any error codes and troubleshoot accordingly.

In some cases, the issue might be due to a faulty sensor or filter. It's important to regularly maintain these components to avoid any problems. Also, keeping a record of when the issue occurs and under what conditions can help narrow down the problem.