You’ve successfully located the storage room. Image of the downstairs storage room in casing mode: If you do not see the labelled room but rather an unlocked door without labels, this means the storage room is downstairs right after you walk past the stairs going up and take a left on the ground floor. If you locate the storage room, this means the keys to the Lamborghinis (Falcoginis) will be upstairs on that exact room. Image of the upstairs storage room from outside: Unlock the power box by the vehicle gates and rewire it to open it regardless of the storage room being upstairs or not. There should be a couple of doors and the one farther in to the hall should either be open or locked with a keypad and have “Storage” written on top of it. Go to the left side of the Teuer Automotives building and look at the second floor. That point aside, please follow the instructions stated below if you are willing to use this guide to it’s maximum extent. This is ironically the only way to correctly stealth any map in Payday 2 as blindly diving into the maximum difficulty in heists will always get you shot to death and restarting. Try and learn the basic layouts of the map before you attempt to stealth it in Death Sentence difficulty. While this map has no preplanning in the lobby, it is good to have a plan nonetheless before you break in to such place.