Why is my Audi A5's engine not starting?

I've been having trouble starting my Audi A5's engine. Every time I turn the key, it makes a clicking sound but doesn't start. What could be causing this issue?

It sounds like your battery might be dead or dying. The clicking sound is a sign that there isn't enough power to start the engine. I would recommend getting your battery checked and possibly replaced if needed.

Another possibility could be an issue with your starter. Sometimes, the starter can get worn out over time and may need to be replaced. I would suggest taking your car to a mechanic to have it checked out.