How do I troubleshoot a non-starting Audi 80 engine?

I recently tried to start my Audi 80, but the engine doesn't seem to start. It's not making any noise or showing any signs of life. What could be the issue and what steps should I take to fix it?

The most common reason for a non-starting engine in an Audi 80 is a dead battery. Check your battery's charge and connections to see if it needs to be replaced or reconnected. If the battery is fine, then the issue may lie with the starter motor or ignition switch.