What could be causing my Audi A4 to have a rough idle?

I've noticed that my Audi A4 has been idling roughly lately. It feels like the engine is struggling and shaking. What could be causing this issue?

It sounds like there may be an issue with your spark plugs or ignition system. You should get them checked and possibly replaced if needed.

Another potential cause could be a dirty air filter. Make sure to check and replace your air filter if needed.

If your check engine light is also on, it could be a sign of a more serious issue. It's best to take your car to a mechanic for a proper diagnosis.