How do I diagnose a leak in my Audi 80's cooling system?

I recently noticed some puddles under my Audi 80, and I suspect it may be leaking coolant. What are the steps I should take to pinpoint the source of the leak and determine the best course of action?

First, check the radiator, hoses, and water pump for any visible signs of leakage such as cracks or loose connections. Also, check the coolant reservoir to see if it needs to be topped off or if the level is abnormally low.

If you can't find any obvious leaks, it's possible that the leak is internal and may require a pressure test or inspection by a mechanic. This should be done as soon as possible to prevent any further damage to your engine.

Make sure to also check the condition of the radiator cap, as it can sometimes cause coolant to leak. And if you notice any strange smells or unusual engine behavior, it's best to have it checked by a professional immediately.