Why does my Ford S-Max's engine overheat?

I have a Ford S-Max and it seems to overheat after driving for a while. The temperature gauge goes all the way up to the red zone. What could be causing this?

It sounds like your car may be low on coolant. Check the coolant levels and top them up if necessary.

Another possibility could be a faulty thermostat. This can cause the engine to overheat. It's recommended to have it checked and replaced if needed.