Hello, my Mokka BJ 2016, 140 hp, 85000km, has cooling water loss, but always only up to a certain brand. That means, the cooling water level never sinks below the stand as shown in the photo. The workshop had changed a hose before, but that didn’t bring anything. I fill every once in a while, but after a short time the cooling water is back on the stand like on the photo and stays there. If something was leaking, like cooler or water pump or cylinder head, then it would have to the container will be empty at some point, right? Because either the system is sealed or not. If I am wrong here, why? And is it bad if the container is not full up to the mark? Would I be happy about ideas for troubleshooting.