How to troubleshoot a rough idle in my Audi 80?

My Audi 80 has been experiencing a rough idle, especially when the engine is cold. The car also shakes and jerks when idling. I've already replaced my spark plugs and air filter but the issue still persists. What steps can I take to troubleshoot and resolve this issue?

It's possible that your fuel injectors are clogged and not delivering a consistent flow of fuel to the engine. Try using a fuel injector cleaner or have them professionally cleaned.

Another potential cause could be a faulty Mass Air Flow (MAF) sensor. This sensor measures the amount of air entering the engine and if it is not functioning properly, it can cause rough idling. Consider having it checked and replaced if necessary.