Here is the answer directly from Otis:
"The Shuffle button is used only by Otis Technicians when they need to change the placement of the lower/upper deck elevators. It allows them to safely board the lower deck car top from the main lobby. A special code is required from the Elevator management system to allow shuffle operation to be activated."
Keep in mind that the elevators in question are double-decked and serve two floors at once.
Click on the green button with an arrow pointing up. that will bring the elevator down. Now before you click on the button on the elevator, make sure you are on the elevator.
The elevator stops and a person talks to you
He tied the button on his shirt. or She pressed the elevator button
To use an elevator, approach the elevator doors and press the button for the desired floor. Wait for the elevator to arrive and open the doors. Step inside and press the button or use the keypad to select the desired floor. Stand back and wait for the elevator to travel to the chosen floor.
The button is used to allow the elevator doors to be open in a safe way and allow the building security etc. to know you are there and need rescue.
Use your EMF Detector and go inside the elevator.
To take the shuffle off of your radio on your truck, the steps will vary depending on the type of radio. For example, you might press the "source" button and choose the "external source" option and then press the "shuffle" button on the menu. This causes the shuffle to turn off if it is currently on. You might also try removing the CD or external sound system to shut down the shuffle.
Hold down the pause play button
Press the right or left button.
push the button
You have to press the up button. You walk inside it and press the up button again.
The Etsatz Elevator takes place in the sixth book. If you ment when in the book, it's when Klaus notices that the elevator has an up button, but they are on the top floor, so he hits it and they find out the elevator is ersatz. Hope this helps!