How do I troubleshoot engine overheating in my Audi 80?

My Audi 80's engine has been overheating, and I'm not sure what could be causing it. Any tips on how to troubleshoot this issue?

It's possible that you have a leak in your cooling system. Check for any visible leaks or puddles beneath your car. If you find one, you may need to replace a hose or gasket.

Another possibility is a malfunctioning thermostat. This can cause your engine to overheat if it's stuck closed. You may need to replace the thermostat if it's not opening properly.