How to maintain the engine of an Audi car?

I have noticed that my Audi's engine is starting to make unusual noises and I am worried that it may lead to bigger problems. How can I properly maintain and take care of my car's engine to avoid any potential issues?

Regularly check and change the engine oil according to the manufacturer's recommendations. This will help to keep the engine running smoothly and reduce wear and tear.

Make sure to regularly clean and replace the air filter. A clogged air filter can restrict air flow to the engine and cause it to work harder, leading to potential damage.