How do I enable the automatic start and stop function on an Audi A6?

I just got a new Audi A6 and I noticed it has an automatic start and stop function. How do I enable it? Will it save me gas?

To enable the automatic start and stop function on your Audi A6, simply press the 'Auto Start Stop' button located near the gear shift. This function will automatically turn off the engine when the car is stopped, such as at a traffic light, and then restart it when you release the brake. This can indeed save you gas, as the engine is not idling while stopped.