How to troubleshoot Audi 80 engine starting issues?

I have an Audi 80 and it's having trouble starting. It's been happening more frequently and I'm not sure what's causing it. Can someone help me troubleshoot this issue?

First, check the battery to make sure it has enough charge to start the engine. If the battery is good, then check the spark plugs to see if they need to be replaced. If both of those things are fine, you may have a faulty starter motor. You can try tapping on it to see if that helps, but it's probably best to take it to a mechanic if you think that's the issue.

Another thing to check is the fuel pump. If the fuel pump is not functioning properly, it can prevent the engine from starting. It could be a problem with the fuel pump itself or the relay that controls it. It's best to have a mechanic diagnose and fix this issue.