Anzeige/Meldung “Wishwasser auffüllen” was saved?

Is it right, if water tank is empty, that there is no message at the Formentor? Was only a bit astounded earlier, when the tank for the wiper water came to the end, that no info in the speedometer came… Even when then was completely empty & nothing was sprayed out, nothing happened. Also I think nothing will be defective. In an Ateca(-Facelift) forum came the same realization Had I so last with a car over 20 years ago & am not assumed that something like that at all At the end of the day it’ll be saved again…