W140/M104 Any idea what this wire is for?

1991- Present : 300SE, S320, 400SE, 400SEL, S420, 500SEL, S500, 600SEL, S600, 500SEC, S500, 600SEC, S600
S320 CDI, S320, S430, S500, S600, S55 AMG, S63AMG, S65AMG
Post Reply
richard300
A Class
Posts: 10
Joined: Tue 28 Apr, 2015 11:18 pm
Model you own: w124

W140/M104 Any idea what this wire is for?

Post by richard300 » Fri 08 May, 2015 11:24 pm

So, recently purchased a 1996 S280. As i cant find a definitive answer on if 1996 onward or 1997 onward is 'safe' with respect to updated wiring harness, i have been inspecting my wiring harness/loom.

I have to say, that my car was either manufactured with the later harness or has had a new harness - As there is no degradation to any of the wires.

However, during my inspection i was looking at the section of loom and connectors around the fuel injectors, and i noticed this random wire/connection along with the brown wire - Neither connected to anything??

The connector has an MB part number of 012 545 40 28

Image
Previous Mercedes:

W201 190e 2.3-16 (Smoke Silver)
W124 300e (Smoke Silver)
R129 500SL (Pearl Grey)
W124 300e -24 with Full 'Carat Duchatelet' conversion (Almandine Red)
W208 CLK55 AMG (Brilliant Silver)
W124 300CE with full 'Carat by Duchatelet' conversion (199 Blue/Black)

User avatar
Giles
300 SL Gullwing
Posts: 3021
Joined: Mon 10 Nov, 2008 3:14 pm
Model you own: I own multiple different models
Location: Australind W.A.
Contact:

Re: W140/M104 Any idea what this wire is for?

Post by Giles » Fri 08 May, 2015 11:41 pm

Brown wires are generally ground.

Giles
1981 500SLC (Colour Black) Keeper car 'Lola' walks like woman, talks like a man
1999 E430 Avantgarde Royal Indigo (Colour 339) Mums Taxi 'Claudia'
1975 280CE Signal Red (Colour 568H) Project 'Ginger'
1980 C107 Classic White (resto project) 'Marilyn'
1999 W163 ML430 MB Search & Rescue Vehicle
1978 C107 350SLC Red 'Scarlett' the parts car. Quite frankly my dear, I don't give a damn.
http://www.kudoscc.com.au

User avatar
AMGC36
E Class
Posts: 58
Joined: Thu 01 May, 2014 9:14 pm
Model you own: w202
Location: LIME STONE COAST Mt Gambier South Australia

Re: W140/M104 Any idea what this wire is for?

Post by AMGC36 » Sat 09 May, 2015 10:27 pm

Hi
The one in your hand my be cam advance in the front of the head left side
Cheers Stefan
1995 W202 AMG C36
Rexton 2.9 with Dieselmeken super pump on WVO

User avatar
John Green
OZBENZ Admin
Posts: 6415
Joined: Mon 20 Jun, 2005 4:49 am
Model you own: w112
Region: Australian Capital Territory
Location: Canberra-center of the known universe
Contact:

Re: W140/M104 Any idea what this wire is for?

Post by John Green » Sun 10 May, 2015 6:34 pm

What are the colours of the two wires going tot he two pin plug?
M.B Spares & Service 14-16 Lyell St, Fyshwick ACT. Ph 02 6239 1099

http://mbspares.com.au - Supporting Australia's Mercedes-Benz Enthusiasts.

richard300
A Class
Posts: 10
Joined: Tue 28 Apr, 2015 11:18 pm
Model you own: w124

Re: W140/M104 Any idea what this wire is for?

Post by richard300 » Mon 11 May, 2015 6:51 pm

Thanks for the replies... sadly, before i saw them, i had wrapped them up with insulting tape and cable tied them back to the rest of the loom.

John, i cant remember what colour the wire were - but there were 3 wires going into the plug.

Someone on MBUK forum told me that they were for the secondary air pump (which my car is not fitted with). I have looked all over and cant see anywhere they should be attached to.
Previous Mercedes:

W201 190e 2.3-16 (Smoke Silver)
W124 300e (Smoke Silver)
R129 500SL (Pearl Grey)
W124 300e -24 with Full 'Carat Duchatelet' conversion (Almandine Red)
W208 CLK55 AMG (Brilliant Silver)
W124 300CE with full 'Carat by Duchatelet' conversion (199 Blue/Black)

Post Reply

Return to “W140, W220 - W222 S-Class”