Perfect place. Automatic works fine, but reading is often difficult for people. Good explanation above the machine. First adjust PKW in wohnmobil. Then enter 10 euros with coins. If you leave PKW on, the slot will indeed block after inserting 4 euros because this is the maximum rate for cars. Electricity is free.

We stayed overnight on the parking space on August 30th. Parking machine was defective. You have to have coins otherwise nothing works (if you have them) the coin slot was blocked with coins. The check came in the morning, I complained (no EC card, no banknotes are accepted). I was immediately punished with a reprimand. That's how the Eifel people are.