I’ve just bought a used v40 D2 15 plate from a Peter vardy dealership. About a week after driving the car I got a low coolant level warning appear on the dash. After topping it back up I noticed that it kept a falling again and so I took it into get looked at. The dealership performed a pressure test and said it was normal but that they removed an air lock inside the system. Got the car back and it’s still having the same issue, it seems to be worse when the engines under a heavier load for example if I’m accelerating a lot in 3rd. Any ideas what I should do?