Why does my Audi A4 make a ticking noise when accelerating?

I've noticed that when I accelerate in my Audi A4, there's a continuous ticking sound coming from the engine. It seems to go away when I reach higher speeds. What could be causing this noise?

The most likely cause of a ticking noise when accelerating is a faulty or worn out fuel injector. This can happen over time due to wear and tear, or if the fuel filter becomes clogged and puts extra strain on the injector.

Another possibility could be a loose or damaged exhaust manifold. This can cause a ticking sound when the engine is under load, such as when accelerating. It's important to get this checked as it can lead to bigger issues if left unattended.