How to troubleshoot a faulty starter motor in an Audi 80?

I have been experiencing issues with my Audi 80 not starting properly. The engine makes a clicking sound but fails to turn over. I suspect it's a problem with the starter motor. What steps should I take to diagnose and fix this issue?

Firstly, make sure that the battery is fully charged. A low battery can cause issues with the starter motor. If the battery is fine, check the connections between the battery and starter motor. If they are loose or corroded, clean and tighten them. If the problem still persists, it's likely that the starter motor needs to be replaced.