Chrysler 2015 300 - Owner Manual - Manual (Page 160)

Dimmer Controls
The dimmer control is part of the headlight switch and is
located on the left side of the instrument panel.
With the parking lights or headlights on, rotating the left
dimmer control upward will increase the brightness of
the instrument panel lights and lighted cupholders (if
equipped).
Dimmer Controls
Instrument Panel Dimmer
158 UNDERSTANDING THE FEATURES OF YOUR VEHICLE