Coolant level warning, washer level warning, and fuel level shows empty (warning). The problems always appear together and sometimes disappear together. Moreover, whenever these problems occur, the AC blows hot air based on the outside temperature. I replaced the fuel level sensor and the ambient air temperature sensor (G17) and the problems still occur.

When I ran the Vag-Com, it showed many errors. I erased the error storage completely and reconnected the Vag-Com, which resulted in three codes left (shown in the pictures below).