Unable to answer "Was sind die Öffnungszeiten von diesem Ort?" – Wassertoilette – https://osm.org/node/12243722098 via StreetComplete 63.1:

This is not a water toilette; instead it is an building with 4 warm showers. The complete building looks like out of order 

Attached photo(s):
https://streetcomplete.app/p/344119.jpg