Visited on May 22 without charging.
The AC chargers are probably the ones behind the garage in the client parking, I didn't go close to see if they have any markings.
The DC charger on the side of the main road, next to the gas station and shop. There are a lot of signs on this charger, with the lower ones difficult to read because the cables are in front.
The large sign "kein öffentlicher parkplatz"could mean the charger is not public, but the signs below seem to say it is public, but just that you shouldn't park there if you are not charging. "Falls der Parkplatz besetzt ist, melden Sie sich bitte im Tankstellenshop" and a 3-language sign "No public parking - Charging station parking lot".
Even if it is public, the prices are very uninviting.
Re-watching my pictures now I notice there's a third green parking spot behind the fast charger against the car wash wall. I don't have any picture where I can see more. This space is also visible on the Google Street View pictures from October 2023 where the BMW parked on it seems to have its charge port open, but I can't see the charger. Maybe it's one of the networked AC chargers.