Headlamp unit, xenon (663FL/FR)
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Headlamp unit, xenon (663FL/FR)
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Left headlamp (663FL)
Right headlamp (663FR)
The headlamp is comprised of the following components:
The task of the headlamps is to provide main beam, dipped beam, parking lights and direction indicators to the front of the car and to regulate beam length with a stepper motor.
The headlamp housing contains bulbs for direction indicator, dipped beam, main beam, and parking light. The light sources are protected by one clear plastic lens. The stepper motor for headlamp levelling, ballast, ignition transformer and a solenoid for dimming are also part of the headlamp unit.
There is a screen in front of the dipped beam bulb, the position of which can be adjusted with a control to change the dipped beam light image between right-hand and left-hand traffic.
The direction indicator is located farthest out towards the long side of the car in a reflector. The amber-coloured bulb is 21 W.
A projector headlamp is located in the centre. It has a light opening diameter of 70 mm. The projector headlamp is used for both main and dipped beam. A dimming screen drops down when main beam is to be used. The bulb is a discharge bulb of type D2S 35 W. The igniter is built into the bulb socket. The ballast of the discharge bulb is located at the bottom of the headlamp housing.
An additional headlamp located closest to the centre of the car is used as a supplement for main beam or for main beam flash when dipped beam is not active. In certain markets, this headlamp is only used for main beam flash (US/CA). The bulb is type H7 55 W. The parking light bulb is also situated in this headlamp.
A stepper motor can adjust headlamp beam length. This stepper motor is controlled by the AHL control module.
Pin No.
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Signal type
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Description
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1
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Ground
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Headlamp's ground
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2
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Power supply B+
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US/CA:
Power supply of main beam flash lamp (661)
Others:
Power supply of headlamp (11)
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3
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Power supply B+
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Power supply, Xenon lamp
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4
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Power supply B+
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Parking light power supply
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5
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Power supply B+
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Direction indicator power supply
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6
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Control
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Control lead for automatic headlamp levelling's stepper motor, from AHL pin 13/11 (LH/RH)
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7
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Control
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Control lead for automatic headlamp levelling's stepper motor, from AHL pin 15/17 (LH/RH)
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8
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Control
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Control lead for automatic headlamp levelling's stepper motor, from AHL pin 12/18 (LH/RH)
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9
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Control
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Control lead for automatic headlamp levelling's stepper motor, from AHL pin 14/16 (LH/RH)
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10
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Control, B+
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Dimmer solenoid control lead, B+ with main beam (US/CA)
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•
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Left-hand Xenon headlamp unit (US/CA)
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•
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Right-hand Xenon headlamp unit (US/CA)
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•
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Left-hand Xenon headlamp unit (others)
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•
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Right-hand Xenon headlamp unit (others)
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Front parking light, left/right
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•
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Front left parking light (13FL)
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•
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Front right parking light (13FL)
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Front direction indicator left/right
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•
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Front left direction indicator (27FL)
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•
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Front right direction indicator (27FR)
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•
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Left-hand headlamp levelling motor (280FL)
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•
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Right-hand headlamp levelling motor (280FR)
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