DIY: 2005+ tail light on 2001-2004 W203 sedan




The connector is a W211 part actually. If you already have the 05 tail light cover and the bulb holder, you will need the following
part # 2115450328 (the connector) you would need two
part # 0155450426 (the metal pins) you only need two if you know how to take the old ones out. IF you are lazy like me you will need total of 13 pins.
here's how you ID what each wire does.
Driver side:
Brown = ground (pin #6)
blk/grey = running light (pin #7 and pin #1)
blk/white = turn signal (pin #5)
blk/red = brake light (pin #4)
grey/blue = reverse (pin #3)
wht/green = rear fog (pin #2)
Passenger side:
Brown = ground (pin #6)
red/grey = running light (pin #7 and pin #1)
green/blk = turn signal (pin #5)
black = brake (pin #4)
grey/yellow = reverse (pin #3)
Driver side:
connector (never mind the exposed wire, gotta redo'em later)

the connector from the front numbered left to right for the pins (7-1). Note the rib part should point upward.

Passenger side:
only 6 pin is needed since there's no fog light on this side.

the connector from the front. again, numbered 7-1, but NOTE the rib part should be facing down when you plug it into the passenger light bulb housing.

here's the end result
running light

fog light on
Last edited by FrankW; Feb 21, 2008 at 08:36 PM.
Do you get any malfunctions displayed in your cluster?
However, I believe the way I did it may need star coding. At present my 2005+ lights work perfectly but I only have one running light each side (just as before I upgraded). Just hope my rear SAM cab be enabled for dual running lights.
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Do you get any malfunctions displayed in your cluster?
However, I believe the way I did it may need star coding. At present my 2005+ lights work perfectly but I only have one running light each side (just as before I upgraded). Just hope my rear SAM cab be enabled for dual running lights.
basically even with you changed the loom there's no power going into the inner running light, so you still have to splice the original running light wire. You should PM Sunil or Steve to find out, but I do not think you can.
Last edited by FrankW; Feb 21, 2008 at 08:40 PM.
Maybe I was subjected to shock therapy in a past life, but messing with the electrics gives me the *******.
Can I trade you a radiator installation for your tail lamp expertise?!




. Suds and lunch will be involved.





if you only used the 04 bulb holder the wattage of the rear foglight bulb is different and that might be your source of smell.



. Very quick and painless if you any other of you guys need this for the updated look! Yeeeeeeeeeeeeeea ;D.