Instrument Panel and Interior Switches Illumination - Overview: Overview
WARNING: This page is about a different car, the 2015 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
Dimmable illumination provides backlighting to switches and control components when the headlamps or parking lamps are on or off. The level of intensity is adjusted by pressing the instrument panel illumination dimmer switch up to increase intensity or down to decrease intensity.