How do I activate the Audi A7's parking assistant?

I recently bought a new Audi A7 and I noticed that it has a parking assistant feature. However, I can't seem to figure out how to activate it. Can someone give me step-by-step instructions on how to use it?

To activate the parking assistant in your Audi A7, first make sure you are in a parking spot big enough for your car. Then, press the button with the P and car icon on it located on your center console. You will see a prompt on your display asking you to engage reverse gear. Once you do, the system will start scanning for a parking spot. When it finds one, it will prompt you to stop the car and let go of the steering wheel. The car will now take over and park itself.