I’m on my way from Frankfurt to Berlin today and I notice a crack in the rear panoramic roof half way. Quite strange, staircase-like shape from one side to the other… Can be grasped from the outside, but not from the inside. Has anyone ever experienced this before? On the net you can read about bursting discs at various manufacturers but I couldn’t find anything from such a crack. Will have this checked in Berlin and hope they can replace it until I drive home again on Thursday.