The car is fully scanned before moving the vehicle, so the system knows the dimensions to prevent any dings, dents, or damage. Rest assured that if things don’t go according to plan, the robots are fully insured. But considering they can carry over three tons and were built by the Germans, we’re thinking everything will be okay.
As you might assume given the fancy pants technology, it's not cheap to use. Parking with Robot Ray will run you €29 ($40) per day. We're glad we don't live in Dusseldorf, because we'd definitely be tempted.