This past weekend several 500 owners met up for breakfast and chat, we also used the time to learn more about our cars. Guido was also on hand and assisted several owners with wiring harness inspections. We noted that at least 3 500's were in need of wiring harnesses in the very near future. Knowing that my car needs one as well I thought I'd try to put together a group buy on these.

Please refer to the M119 Topic in 500Ectasy for more information.

__________________
Afshin

Current:
02 C32 AMG

Previous:
92 500E
84 190E 2.3 5 Spd

Is the wiring harness the same between the 92 500E and 92 400E?

I figure its unlikly but may as well ask since I have a 92 400e with I believe its original wiring harness. I'll pull the air housing in the next few days and take a closer look.

Paul

Are the new wiring harnesses made with better heat-resistant materials?

:-) neil

Made wit the same crummy old plastic sheathing. AF I am going to sell an extra one I have to vince, for alot less,so you can exclude him. As Far as I know 92-94 harenss shoould be the same. I think just the part no# changes.

all the systems are the same, lets see, here. 8 injectors,1 aux fan switch,2 cam advance switches,main hook up to module external,I belive a few ground wires by module box,speed sensor hook up,coolant temp sensor.. Nothing really is differnet.


Well anyways. thats about it.


Af I can't get scotts site to work. Is something wrong with it.


Guido


Hey Neil.
Its going out today. I was in the doctors all day for some out patience surgery I had.

__________________
500E Sold
2006 Mini Cooper S
Modified,pulley,injectors,suspension
2009 E350 Sport AMG package

Af forgot to mention. But evey time you change the harness/By the right valve cover, the breather hose is brittle as hell always breaks. Don't for get to order this inexpensive hose.,If not you have a giant vacum leak car will not run.















GDOG!

__________________
500E Sold
2006 Mini Cooper S
Modified,pulley,injectors,suspension
2009 E350 Sport AMG package

moruzzi,

I'll list the part numbers as soon as I can retrieve them. You can compare them to yours and determine if they're the same. Maybe someone else can chime in on this one.

Neil,

It is an OE wiring harness, from what Guido mentioned it sounds like we're getting the same poorly insulated harness which we can all expect to last another 10 years before replacement.

Guido,

I've been wondering what the changes are between the harnesses, why the huge difference in price? EDIT: Is MB pulling the wool over our eyes? Can you check your manuals and compare the two in detail, we need to be 100% sure they're identical or different. I appreciate your help on this! Glen suggested having my contact order both sets of harnesses and doing a comparison, I think I might try to do this for everyone's benefit. If anyone has already done this I'd love to know what you found.

Not sure what's going on with Scotts site, I coudln't get on yesterday or today.

__________________
Afshin

Current:
02 C32 AMG

Previous:
92 500E
84 190E 2.3 5 Spd

I'd be interested in getting someone's old/bad harness, and see what would be involved in splicing in new aircraft-quality heat & oil resistant wiring sheathed in aluminum and fiberglass.

:-) neil

You know if we really want to get into this we can reverse engineer the harness I havn't checked yet but I assume there are no proprietary connectors. All we need is the connector types, pinout, and wiring gage. We can get the lengths off an existing harness then contact a vendor to have them made. Alternatly we could try and find out who makes Mercedes wiring harnesses?

I think we'd need a larger volume to make this worthwhile but there is no magic in harnesses asside from a bunch of labor its usually a fairly crude set up.

Paul

No doubt, we could reverse engineer this. But I'll be the first to say that if I spent the time to reverse engineer the harness I'd add my labor into the cost and I think many others would too. I guess the big question is, does it make sense to research what wires will work best in an high temp oily environment and how can we insure better results for our efforts? And if someone does reverse engineer and decides to sell the harnesses, will a warranty be included? MB provides a 1 year warranty but we all know the harness will last about 10 years/100k miles. Just playing devils advocate.

__________________
Afshin

Current:
02 C32 AMG

Previous:
92 500E
84 190E 2.3 5 Spd

My interest in doing this would be in making a wiring harness that could interface with an aftermarket fuel-management system like a Motec or TEC-III.

I strongly believe there is a lot more potential in the M119 engine, but the old LH electronics just can't do it. Didn't MB get better/broader HP & torque on the M119 engine when they went to Bosch ME, all else being equal?

More importantly, IF made with better heat-resistant materials, then one can at least rule-out a bad wiring harness during fault diagnosis . . .

Also, makes it easier for forced-induction . . .

:-) neil
1988 360TE AMG
1993 500E

Mor you would wasting so much time triying to pin pin point all the wires, going into the can connector,plus alot of connectors only come with harness on early models. neil. You have the right idea. to plug it into a new management system. but bootm line is. these damn engines just dont breath underneath the hood. I can't imagine what our knock sensor harness looks like. Pasted right to the side of the bock and in the intake pluenum.



Af I will get back to you on it.


I havew a harness from a `1994. I will compare it to my my 1993.

whats was the chasis break,was it 92-93 93-94




G dog

__________________
500E Sold
2006 Mini Cooper S
Modified,pulley,injectors,suspension
2009 E350 Sport AMG package

Guido,

Chassis break was 92 to 93, 92 harnesses have their own separate part number while the 93 - 94's share a part number. I appreciate the help on this as will many other 92 500 owners if they are indeed the same.

__________________
Afshin

Current:
02 C32 AMG

Previous:
92 500E
84 190E 2.3 5 Spd

Af. I am home today. I will check in @ work tommorow. And figure this out. Vince his 500E is what Yr.




I will see why this is so. The only thing I can think is that incorperate the the coolant temp switch. They put the blue fan switch and the coolant temp sensor switch all in one.



I will look in my tool box tommorow and what is the differnece.







see ya Guido

__________________
500E Sold
2006 Mini Cooper S
Modified,pulley,injectors,suspension
2009 E350 Sport AMG package

Is this the main wiring harness?

Hi all,

There are two main harnesses. One is for the engine, and goes to the injectors, etc. The other is the really big one that spiders all over the engine compartment.

The engine harness is:
124-543-95-26 (1992 only) - about $400 wholesale
124-440-20-06 (1993-94) - about $350 wholesale


The big "body mounted cable harness" is:

124-543-59-06 (1992) - ~$1000 wholesale
124-440-54-05 (1993) - ~$1400 wholesale
124-440-23-32 (1994) - ~$1700 wholesale


From what I've heard, Mercedes used "environmentally friendly" wire insulation starting in the early 1990's, around roughly 1991/92 I think? It would degrade over time, start crumbling or something, and allow things to short out. Worst case it could cause a fire, which of course is really bad news. Some were replaced under Starmark warranty if you pitched enough of a fit but often it wasn't covered. I don't know if the new harnesses have the same lousy insulation or not, but Guido says it's the same ol' stuff, and the part numbers didn't roll so I bet he's right. I'll attach some screen shots below. I hear the big harness takes hours to replace and is a real PITA. I'm not sure about the smaller harness, it can't be as bad of a job. I wonder if both deteriorate at the same rate, or if the body harness is more immune from engine heat...? Hmmm.

__________________
Dave
Boise, ID
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