TO OPEN THE BARRIER: take a ticket. Park in any free space. Go to the office with your reservation and the ticket. (The control booth is located next to Exit 2 of the parking deck).
DEPARTURE: use the ticket the staff gave you.
IF YOUR BOOKING ALLOWS UNLIMITED ENTRANCE AND EXIT: Follow the same process, indicated before, to enter and exit.
If necessary or for whatever problem, you can speak with Control from the Entrance/Exit points or speak to the workers that are in the parking deck.
Avda. de Portugal, 51, Madrid