Because there is no free parking, and it was BY THE HOUR, not by the day, we returned our rental car early. I asked the staff on how to use the public transportation. They tried really hard. But with limited English, and my very limited German, there were things left unsaid that should have been said. Such as the name of the station where we were located. We spent 11 euros each to go just one stop!
When we came back to the hotel, there I saw a sign with more info regarding the train. WBU did the staff not show me this sign?
Oh and they had no caffeinated coffee to give us in our room, tho they offered us to come downstairs for a free coffee