Glossary

Xenon plus headlights*

Xenon plus headlights provide a higher level of safety during night-time driving or in bad weather – with the added benefit of low power consumption. The large light arc with qualities similar to daylight has an enormous range. It produces wide illumination of the road ahead, allowing early recognition of obstacles.

Xenon plus headlights are electronically controlled and use gas discharge lamps. The gas in the lamps has the inert gas xenon as its main constituent and is ignited by a high-voltage. The resulting arc is very bright and serves as an excellent light source to illuminate the road.

The white colour of xenon light with a higher colour temperature is attributable to the fact that its spectrum is much closer to daylight than conventional halogen light. Furthermore, xenon plus headlights produce about twice as much light as comparable halogen headlights, and make night driving, particularly in poor weather, less tiring for the driver’s eyes. Other road users can be seen earlier. Xenon headlights provide better lighting of the road ahead with optimised lateral and forward illumination. To avoid dazzling oncoming traffic, the headlights are equipped with automatic headlight range control and a headlight washer system. Xenon plus headlights’ advantages also include a longer life than halogen systems and roughly 20% lower power consumption.

When the driver switches to main beam or back to dipped beam, an electromagnet is energised. Depending on the reflector type, this either repositions a gate in unison with the ellipsoidal reflector, or pivots the xenon burner. The large amount of light produced by the xenon arc permits dispersion of the main beam, combining a very large range with broad lateral illumination.

* Optional equipment on some models. Please check with your local Audi dealer.