I had parked the car overnight in such a way that the front was pointing upwards on a road with a slope. When I got in this morning, I saw that water drops were hanging on both C-pillars, the tailgate I had not yet opened at that time, so the water could not come from there. I could only take the attached photos about an hour later, a large part was already dried off. Nevertheless, it can still be clearly seen that it was not very little water. Above the dividing line of the C-pillar covering visible in the pictures everything was dry, so I believe that the water has come out of this seam. Can it be that the processes end from the sliding roof?