How do I fix a leaking coolant reservoir in my Audi 80?

My Audi 80 is leaking coolant, and I suspect that it might be coming from the coolant reservoir. What steps should I take to diagnose and fix this issue?

First, make sure the leak is actually coming from the coolant reservoir and not from a different part of the car. Then, check the reservoir for any cracks or damage. If it is damaged, it will likely need to be replaced. If there are no visible cracks, the leak may be coming from a faulty seal. In this case, you may need to replace the seal or have a mechanic take a look at it.

Another potential fix is to use a coolant leak sealant. However, keep in mind that this is a temporary solution and may not permanently fix the issue. It's best to have a professional take a look at your coolant system to diagnose and fix the problem.

Make sure to regularly check your coolant levels and keep them topped off. Low coolant levels can cause your engine to overheat, which can lead to other costly problems.