Citroen C5 Aircross Quiz
Exterior lighting / signalling

Xenon lamps with dynamic headlamp levelling

In this manual: Exterior lighting / signalling
AAS - Parking Aid — 8Owner's Manual Citroën C5 II — 139Citroen C5 Aircross (2017- 2024) - Owner's Manual — 143Audio system — 14Overspeed control — 7Multifunction display — 4Driver information instrument cluster — 20Navigation assistance — 8Intruder alarm — 7Mechanical specifications — 9Power supply — 8Electrical equipment — 13Lighting and electrical equipment — 3Immobiliser — 4Sunroof — 10Exterior lighting / signalling — 38Multiplexing — 7Air conditioning — 7Body — 6General specifications — 9Automatic gearbox control — 3Exterior mirrors — 10Airbags — 5Defrost — 6Underinflation — 6Interior lighting — 4Wipers / Washers — 6Window lifters — 11Cooling — 8Opening management — 7Cruise control — 5Suspension — 4Grip management — 1Paint — 2Exterior lighting control — 1Indicators (turn signals) — 1Automatic lighting systems - General recommendations — 1Wiper control — 1Special position of the front wipers — 1
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The vehicle may be fitted with xenon dipped-beam headlamps.

Advantages of xenon lamps:

  • field of view doubled,
  • better lateral visibility on winding roads,
  • higher night-time lighting performance,
  • improved visibility in dipped-beam position, without dazzling oncoming drivers.

Xenon lamps do not contain a filament.

The light from these lamps is generated from two electrodes in a quartz bulb containing a high-pressure gas (xenon).

Ampoule de quartz
Quartz bulb

A xenon lamp has a service life four times longer than that of an incandescent lamp.

The xenon lamp ignition system consists of:

  • a D2R lamp,
  • a headlamp incorporating the levelling corrector linked to the lamp ballast and the control unit.

Vehicles fitted with xenon lamps are equipped with dynamic headlamp levelling and headlamp washers.

Warning: The battery must be disconnected before any of the following operations:
  • removal / refitting of the xenon lamp system,
  • replacement of a faulty lamp.

When the vehicle's attitude changes, the correction system keeps the beam aim constant relative to the initial setting made at the factory or in the after-sales network.

The correction system consists of:

  • an actuator per headlamp incorporating a stepper motor,
  • the control electronics located at the rear of the headlamp.

Note: A vehicle fitted with xenon lamps is not fitted with fog lamps.

AUTOMATIC ACTIVATION OF THE HAZARD WARNING LIGHTS

The automatic hazard warning lamp function improves safety by automatically signalling sudden heavy deceleration or accidents.

The automatic hazard warning lamp function operates according to the following parameters:

  • sudden heavy deceleration,
  • impacts (triggering of a pyrotechnic element).

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