I don't think 10 € for pure parking without any service is a little. It's outrageous that you have to pay for it when you've bought more than €100 from Karls. For customers who shop for a set amount, e.g. €50, the night should be free. It's the same with many others, e.g. wineries.

Easy parking at the Karls Erdbeerhof, price for the area here okay, close to Lübeck and Travemünde very good breakfast in the morning at Karl's for one night ok