What is the cause of a rough idle in my Audi 80?

I have been experiencing a rough idle in my Audi 80, especially when starting the engine. It seems to smooth out once the car warms up. What could be causing this issue and how can I fix it?

It is possible that your idle air control valve needs to be cleaned or replaced. This valve controls the amount of air going into the engine when idling and if it is dirty or malfunctioning, it can cause a rough idle. Try cleaning the valve first, and if the issue persists, consider replacing it.