Please contact the team in the breakfast area. They have a limited number of tickets in stock, which you can purchase on site. Please pay for your ticket directly to the team. The price for an exit ticket is 12 euros.
ONE TICKET = ONE EXIT from the underground car park. So if you want to leave every day, you need one ticket per day and vehicle.
You can also order your discounted ticket at the same time as your online booking.
See also: Where can I park?