How do I diagnose and fix a rough engine idle in an Audi 80?

I've noticed that my Audi 80 has been idling rough lately, with noticeable vibrations and occasional stalling. What could be causing this issue and how can I fix it?

First, check for any vacuum leaks in the engine. They can cause a rough idle and are relatively easy to fix. If that doesn't solve the issue, it could be a problem with the fuel injectors or spark plugs. Have these components checked and replaced if necessary.

Another common cause of rough idle is a dirty or faulty mass air flow sensor. Make sure to clean or replace it regularly to maintain proper engine performance.