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M-Class BiXenon Headlights Circuit diagram
Mercedes M-Class 2002 BiXenon headlight internal wiring
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high beam shutter motor 12V-------------------------+
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off |
halogen H7 bulb 12V---white--o |
------------o---white--+-----high beam connector
--o ||
on ||
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+--RELAY--+
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brown yellow
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xenon ballast 12V--------------(----------+---------------low beam connector
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xenon ballast/relay ground------+-------------------------ground connector 1
shutter/H7 ground-----------------------------------------ground connector 2
12V DC leveling motor ---------------------------------- \
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12V DC leveling motor ---------------------------------- |
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| to dynamic leveling
} contoller under the
position sensing pot. +-------------------------------- | dash on the
| | driver's side
position sensing pot. \-(var)-------------------------- |
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position sensing pot. +-------------------------------- /
This BiXenon lamp can simply be plugged into the standard 3 pin headlamp
wiring harness in the ML (some pins may have to be relocated, depending
on version, model year, prior mods etc; or adapter harness). The ML's
wiring switches on low beams and switches on the high beam thusly:
A - If the low beams are OFF when turning the high beams on with
"flash-to-pass" stalk the halogen H7 is turned on.
B - Alternately, if the low beams are ON when activating the high beams
the halogen H7 will not be turned on; unless modified by bypassing
the relay, pulling off the two white wires, and connecting them.
Works with DRL, and non-DRL systems.
M-Class headlight connector pinouts
MY2000 M-Classes without factory HID I checked have these two headlight
connectors. Some versions may not have all of the wires/pins.
Eight position connector with two rows of four (ML wiring harness)
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pin A pink wire low beam
pin B orange wire range adjustment motor (halogen version, manual leveling)
pin C blue wire range adjustment motor (halogen version, manual leveling)
pin D - not used
pin E tan wire ground
pin F green parking/standing/city light
pin G white high beam
pin H gray foglamp
Three position connector with single row of three (ML wiring harness)
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pin A tan wire ground
pin B blue wire parking/standing/city light
pin C green wire turn signal lamp
As-is with no warranties or guarantees.
Written in 2002.
MBUSA tech training file (pdf)
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