Why is my Audi A7 struggling to start?

I recently purchased a used Audi A7 and have been having trouble starting it. When I turn the key, the engine makes a clicking sound and won't start. What could be causing this issue and how can I fix it?

This could be a sign of a weak battery. Try jump starting your car or getting your battery tested at a mechanic.

It could also be a problem with your starter motor. You may need to have it replaced.

Have you checked your fuel level? It's possible that you may simply be out of gas.