How to activate the automatic start-stop function in my Audi A4?

I recently bought an Audi A4 and noticed that the automatic start-stop feature is not working. How can I activate this function and make it work efficiently?

To activate the automatic start-stop function, first make sure that the feature is enabled on your vehicle. You can check this by going to the settings menu on your car's infotainment system.

If the start-stop function is already enabled but still not working, it could be due to a faulty battery or alternator. Have these components checked and replaced if necessary.