BMW 528I User Manual download pdf (Page 195)

195n

RepairsIndex OverviewControlsCar careTechnologyData

Level control system* Xenon lamps*

The level control system for the rear

axle maintains constant ground clear-

ance of your vehicle, even when carry-

ing a load.

To achieve this, the vehicle is equipped

with air struts at the rear axle instead of

conventional shock absorbers and steel

suspension springs. With the help of

two sensors, an electronic control unit

calculates the height of the body at all

times and, if it is required, it allows air

which is generated in a compressor to

flow into the air springs.

As a result of the pressure increase in

the air springs, the level control system

ensures not only constant ride height,

but also ride comfort which is indepen-

dent of the load the vehicle is carrying.

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The xenon lamps light up the side and

front areas of the vehicle with signifi-

cantly more brightness and uniformity

then the traditional halogen lamps.

In a xenon lamp, an electric arc

replaces the filament in order to gener-

ate intense illumination. A gas mixture

in a quartz glass tube with metal vapor

is ignited by a high electric voltage. The

arc that is generated is then sustained

by a lower voltage. When the lamp is

turned on, a brief period is needed for

the full beam strength to build up. Maxi-

mum brightness is attained in approx.

15 seconds.

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Xenon lamps provide significantly-

improved visibility, especially during

adverse weather conditions and driving

situations (driving at night in heavy rain

or through road repair areas where

there are no lane markers, for instance).

Vehicles with xenon lamps

are

equipped with automatic headlamp

range control. As a result, the highway

is always optimally lighted, regardless

of load conditions, and drivers in on-

coming traffic are not blinded.

Xenon lamps make a significant contri-

bution to highway safety since other

highway users, or bicyclists and motor-

cyclists in the right lane, and pedestri-

ans are more easily detected.

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