Why does my Audi 80 engine shake at idle?

I recently bought a used Audi 80 and noticed that the engine shakes when the car is at idle. What could be causing this and how can I fix it?

The most common cause of engine shaking at idle is worn out engine mounts. I would suggest getting them checked and replaced if necessary.

It could also be due to an issue with the spark plugs or ignition system. I would recommend getting a tune-up and replacing any worn out parts.

Another possibility is a clogged fuel filter, which can restrict the flow of fuel to the engine and cause shaking. Have it checked and replaced if needed.