How to troubleshoot an overheating Audi 80 engine?

I've noticed my Audi 80's engine has been running hotter than usual. What could be causing this and what steps should I take to address the issue?

First, check the coolant level and make sure it's at the appropriate level. If it's low, top it off with a 50/50 mix of water and coolant.

Next, inspect the radiator for any signs of leaks or damage. If there are any issues, it may need to be repaired or replaced.