How do I activate the start-stop system in my Audi A1?

I recently purchased an Audi A1 and have noticed that the start-stop system is not functioning. I am wondering how to activate this feature and if there are any tips to ensure it works properly?

To activate the start-stop system in your Audi A1, make sure the system is turned on by pressing the button with the letter 'A' and the circular arrow symbol on it. It is located on the center console near the gear shift. Additionally, make sure that your battery is in good condition and has enough charge to support the start-stop system.