What could be causing my Audi A2 to constantly overheat?

I've noticed that my Audi A2's temperature gauge is always in the red zone, even when driving short distances. What could be causing this issue and how can I fix it?

It is possible that your radiator or coolant system is not functioning properly. Have you checked for any leaks or low coolant levels?

Another potential cause could be a faulty thermostat. This can prevent the coolant from circulating properly and lead to overheating. It's a relatively inexpensive fix.

It's also important to regularly check and replace your engine's coolant and water pump. Neglecting these maintenance tasks can lead to overheating issues.