Hello all, I’m a little helpless the heating for the interior doesn’t get warm. The strange thing in the stand the heating gets a little warm, but as soon as I drive it will be cooler and cooler! The cold air conditioning seems to work (although I can’t judge this with the cold at the moment) Moreover, it loses cooling water! Does anyone have an idea? My personal guess is the heat exchanger, only would be very annoying if I let the exchange and then it is a bit different it!?!? Thank you already Many greetings Ben