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CODE LM3
123
BI-XENON HEADLAMPS
LIGHTING
Bi-xenon (HID)
headlamps with
cornering light
function
Details and Technology
The bi-xenon headlamp light source is a gas-discharge light which produces a luminous arc in a quartz
bulb filled with a gas mixture. The main beam is produced using the full light beam, while the low beam
is produced by moving a shutter between the bulb and the lens, so the long-range portion of the light is
blocked off, thus preventing dazzle.
Sensor-controlled dynamic range adjustment automatically counteracts changes in the angle of the
headlamps due to changes in the attitude of the vehicle when braking or accelerating, or due to changes
in payload. In addition to the normal road illumination provided by the low beam headlamps, at speeds up
to 40 km/h (25 mph) a second bulb in the headlamp unit comes on automatically – when the direction
indicator is operated and the steering wheel is turned beyond a certain angle – on the side corresponding
to the direction in which the driver is signalling. This light may also be activated when cornering at speeds
up to approx. 69 km/h (43 mph) (with low beam on/direction indicator off), depending on steering angle and
corner radius.
So that the lighting change is not too sudden, the additional light is dimmed up gradually. When in
reversing to the right, the left hand cornering light comes on at the front. When reversing to the left, the
right hand cornering light comes on. The fog lamps are integrated in the bumper.
Benefits and Arguments
• Significantly increases range in main beam mode
• Wider illumination of the road margins in low beam mode
• Automatic headlamp range adjustment prevents oncoming traffic from being dazzled
• Extended vision when cornering
• Reduced accident risk when making a turn in the dark
The bi-xenon headlamps allow pedestrians and other obstacles to be spotted sooner.
Remarks
Included in Accessory Group (ACL). Available as a stand alone option on all models.