How to fix a leak in the radiator of an Audi 80?

I noticed that my Audi 80 is leaking coolant. I suspect there might be a leak in the radiator. How can I check and fix this issue?

First, let the car cool down before attempting any fixes. Then, using a pressure tester and a flashlight, check for any leaks in the radiator by applying pressure to the system and looking for any signs of coolant escaping.

If a leak is detected, you can try to patch it up with a radiator repair kit. Just make sure to follow the instructions carefully.

If the leak is too severe or the radiator is damaged beyond repair, it's best to replace the entire unit. Make sure to purchase a brand new radiator from a reputable source.