How to troubleshoot the sound system on a Audi A6?

I recently purchased an Audi A6 and the sound system doesn't seem to be working properly. How can I troubleshoot and fix this issue?

First, make sure that the volume is turned up and all the speakers are connected properly. If the issue persists, try resetting the audio system by disconnecting the battery and reconnecting it after a few minutes.

If the above steps don't work, it could be a problem with the amplifier. Check the fuse and make sure the wiring is not loose. If you're not comfortable doing this yourself, it's best to take your car to a professional mechanic.