headlight bulb AUDI A6 2005 C5 / 2.G Electrics System Training Manual

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External lights
Front headlights
Three different front headlights are used in the
Audi A6 ’05:
– Halogen headlights
–Bi-xenon headlights
–Adaptive light
Halogen headlights
Halogen headlights come as standard.
The following lamps are fitted in the halogen on the
vehicle equipment:
– W5W lamp for parking light
– H1 lamp for high beam headlight and headlight
flasher
– H7 lamp for dipped beam headlight and dimmed
as a daytime driving light
– An orange PY21W bulb as the direction indicator
light
The daytime driving light in the halogen headlight is
only available for Canada and the Northern
countries (Scandinavia). It is active when
terminal 15 is switched on and the parking light or
dipped beam light is off.
The following country-specific variants exist:
– The daytime driving light is part of the fog lights
for Canada and
– 3457NA flasher lamps are used for USA and
Canada.
A manual headlight range control system – with
potentiometer – is installed for halogen headlights.
Convenience electrics
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12 3 4 5
1W5W lamp
2H1 lamp
3H7 lamp
4 PY21W lamp
5D2S lamp

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Bi-xenon headlights
Bi-xenon headlights are installed with the
"XenonPlus" option.
The following lamps are fitted in the bi-xenon
headlight:
– A blue W5W lamp for the parking light.
The colour of the parking light thus corresponds
to the xenon light.
– A D2S lamp for high beam headlight, headlight
flasher and dipped beam headlight. The covers
fo r d i p p ed b e am a re al s o a c t i v at e d fo r h i gh b ea m
and headlight flasher operation.
– A P21W lamp for the daytime driving light.
This comes on dimmed to 90 %.
– A PY21W bulb coated with a reflecting layer of
silver is used as the direction indicator light.
Only longlife lamps are used. A super-longlife
lamp is used as the daytime driving light.
The following country-specific variants exist:
– No daytime driving lamp is fitted for Japan.
– 3457NA flasher lamps are used for USA and
Canada.
The headlights are changed over to left-hand drive
via a lever on the projection module.
A dynamic headlight range control system is
installed for bi-xenon headlights.
The dynamic headlight range control system uses
the well-known level sensors. This send the
information about the vehicle level to the control
unit for headlight range control J431 via a pulse
width-modulated signal.
The same level sensor is fitted on both the front and
rear axle.
Headlights are also available with dynamic
corner-sensitive lights.
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