How to fix overheating issues in my Audi A4?

I've been experiencing overheating issues in my Audi A4. The temperature gauge keeps going up and I've noticed some coolant leak in the engine area. What could be the potential cause and how can I fix this issue?

One possible cause for the overheating issue could be a faulty water pump. It is responsible for circulating coolant throughout the engine and if it's not functioning properly, it can lead to overheating. I would recommend getting it checked and replacing it if necessary.

Another cause could be a clogged radiator. Over time, dirt and debris can build up in the radiator, preventing proper airflow and causing the engine to overheat. Have your radiator flushed and cleaned to see if it helps with the issue.

You should also check the thermostat. If it's stuck closed, it can block the flow of coolant and cause the engine to overheat. Consider replacing the thermostat if necessary.