How can I enable Audi Traffic Jam Assist on my 2018 Audi A6?

I recently purchased a 2018 Audi A6 and noticed that it has the option for Traffic Jam Assist, but it seems to be disabled. How can I enable this feature and what are the benefits of using it?

To activate Audi Traffic Jam Assist on your 2018 Audi A6, first make sure your vehicle is equipped with the optional Adaptive Cruise Control with Stop & Go function. Then, press the ACC button on the steering wheel and select the TJA button on the central control knob. You can then adjust the desired following distance and let the vehicle take over steering, braking, and accelerating in congested traffic situations.