Why won't my Audi start after replacing the battery?

I recently replaced the battery in my Audi A4, but now it won't start. When I turn the key, all I hear is a clicking sound. Any ideas on why this is happening and how I can fix it?

It sounds like there may be an issue with your starter or starter solenoid. Check the connections to make sure they are clean and tight. If that doesn't solve the issue, it may be time to have a mechanic take a look.

Have you checked your spark plugs? A faulty or dirty spark plug could prevent the car from starting, so it's worth checking them out before taking it to a mechanic.

While rare, it is possible that the new battery is defective. Try having it tested at an auto parts store to rule out that possibility.