Lighting rheostat
System for manual adjustment of the brightness of the instruments and controls in relation to the exterior brightness.

Activation
When the lighting is on:
- press the button to change the brightness of the instruments and controls,
- when the level of brightness required is reached, release the button.
Deactivation
When the lighting is off, or in day mode on vehicles fi tted with daytime running lamps, pressing the button does not have any effect.
See also:
Headlamps
Front headlamp unit with Xenon bulbs (D1S)
Bulbs:
A S idelamp: W5W
B Dual-function Xenon lamp (dipped/main): D1S
C A ngular lighting: HP19
D Daytime-running lamp: HP24
For the maintenance of t ...
Efficient engineering
Citroën has utilised the latest industrial technologies, along with a 'part
by part' focus on reducing the weight and number of components in new C4. For
example, the laser welding on the roo ...
Exterior
Directional headlamps
This lighting function automatically improves forward vision when cornering.
Guide-me-home lighting
The headlamps stay on for a short period after switching off the ignition ...






