Chrysler 2013 300 - Owner Manual - Manual (Page 234)

To change the distance setting, press the Distance button
and release. Each time the button is pressed, the distance
setting adjusts between 3 (long), 2 (medium), and 1
(short).
If there is no vehicle ahead, the vehicle will maintain the
set speed. If a slower moving vehicle is detected in the
Distance Set 2 (medium) Distance Set 1 (short)
232 UNDERSTANDING THE FEATURES OF YOUR VEHICLE