My Karoq has had a very low cooling water level several times in recent times. Under the vehicle no water residues are visible. In the workshop the cooling system was tested under pressure, there were no leaks visible. My previous observation is, the problem occurred after a longer motorway ride, the morning after then the red cooling water indicator lights up and there is actually about 300 ml missing. The cooling water temperature was always in the normal range of approx. . 90° and during the ride nothing was displayed, as said only in the morning after. The cooling water in the container looks completely normal, no streaks or lubricating. Also the oil looks completely normal at my discretion, not muddy or foamy. I also did not observe any unusual smoke development (which is also difficult during the ride as a driver). The vehicle is 6 years old and has driven about 80tkm. Since the Skoda workshop could not really help me so far, I would like to know if others also know these symptoms and if they know a solution.