Been there, done that. It's just standard late W124 with the eco junk wiring stuff.

If you're interested, I have a wiring harness from a very low mileage '95 E300 for sale at a low price. If nothing else, it'll help you save up for the real replacement harness.

PM me if interested.

 

Thanks, is it the updated harness or the original stuff installed in the 90's? I was under the impression the new harnesses will survive the test of time due to an upgraded material and construction process.

 

It's the original stuff but it should buy you a good 50K miles or more before you'll have to get the updated type.

I'm selling it for a fraction of the updated type, so if you're a bit tight on money this might be a good option for you.

Also be aware that on my diesel I also had to replace the aux fan wiring harness (separate from the engine wiring harness) for the same reasons.

 

Ah gotcha, thanks but I think I'll have to bite for the updated one. I put over 40k on a year these days so I'd rather just get it over with once now, even though it's my understanding the new harness will run about $400 for my diesel.

 

Does anyone have a decent pic of what these late model diesel harnesses look like when they're removed from the car?

Just last night I finally finished dissecting the engine harness from an earlier diesel model. The ECU wiring is tightly intertwined with the KLIMA and OVP circuits, which makes them a real chore to remove from the car. I suspect that the later models are more modular, which allows them to be replaced much easier

 

Probably not diesel, but nonetheless wiring from the same era and the same supplier. It's also exactly what my engine wiring looked like.

 

Wow, that's really bad. I didn't realize the failure mode was so total throughout the harness.


I'm hoping someone has pics of the entire harness in one shot.

 

Tonight I'll take a couple pix of the harness that came off my '95 diesel with less than 50K on the dial.

 

Those pics do show some bad damage for sure. The wires at my coolant temp sensor are completely exposed, I suspect there are plenty of other exposed spots too.

 

Some pix as promised. Remember, this is from a '95 E300 DIESEL that was manufactured in May '95. This was removed from the very last W124 diesel imported into the USA and the mileage at removal was just under 50K.

 

Thanks for the pics. That's definitely a way different animal than the earlier diesel models. Is that 14 pin socket the only direct connection between the engine and body in this particular harness?

This is the earlier harness while I was in the middle of dissection:

 

Thanks for those pics, you seem to be the resident E300D OM606 guru around here. That price is consistent with what the dealer here told me ($615 or so), I'm going to see if my usual parts guy can get it a little cheaper, but I fear this may be a dealer-only part.

 

Yup, that 14 pin is the sole connector between the engine and body.

I think one of the reasons for the simplicty is because the 95 OM606 is non-turbo, and thus EDS only has one task (idle speed control).

Very different from a OM602 where EDS is also responsible for turbo boost using vacuum and such.

 

That's really good to know. I'll try and recreate that big multi-pin plug on the harness I'm building for my wagon.

 

Forgot to mention one more thing.

I think EDS has one more function and that is to control the 2 intake runner flaps for the variable intake manifold based on RPMs.

You can see the connectors for the flaps in the second to last pic right above "Mercedes-Benz". It's the only pair hooked up in parallel to the harness.

 

95 E300 Engine Harness

Looks like i'm getting ready to replace my engine harness too...Insulation around wiring has totallt began to break down all over compartment..I see the part # is 124-440-4032..Any ideas where to buy except dealership?Any shortcuts that you all have found would greatly be appreciated..Thanks Guys!!

 

95 E300 Wiring Harness

Go to Genuine Mercedes Parts and type in 1244404032 and the harness price should come up..Last time i checked it was $416.00 but may of increased since then..I still haven't replaced mine at this point but i will have to very soon..Having issues with coolant temp guage being erratic while driving...Let me know if anyone finds a cheaper price and easy removal and install..

 

Hello guys!
It looks that I have the same problem like you did. I have to replace the wire harness on my 95 E300D. In order to do this I have to remove the intake manifold and I cannot find any DIY on this job. I would want to get the gasket. Do you guys have a part number for this? There is something else, like gaskets, O-rings or seals what I should get? I would appreciate any heads up on this job.
I found the harness at Parts.com for $416+tax and shipping. Is this the best place to get it from? Is the part # 124 440 4032 right?
Thant you

 

As I already in your other thread asking the exact same question, manifold removal on the '95 E300 DIESEL is mandatory but is very easy.

Remove crossover tube, disconnect throttle linkages and removal manifold. Be sure mark and keep track of which vacuum & electrical connections go where.

MB harness p/n# is 124 440 40 32

 

By looking at the photos it seems there should have been a factory recall for this harness. What a shame with less than 50,000 miles. I learned something new today even though the thread is from last year.
Most of these vehicles were serviced under dealer warranty while I was working in the field.

All the Best, Mike

 

By looking at the photos it seems there should have been a factory recall for this harness...

Yeah, no doubt. This has to go down as the PR failure of the century for MB. I can't think of more of a manufacturing defect case than this.

MB's customer service really left a LOT to be desired. This is one thing I am glad for when Lexus came around, as it caused MB and other luxury brands to stop sitting on their laurels.

I've heard rumors that IF MB would have issued a worldwide recall for this issue, it would have financially hurt MB so bad (since almost every passenger vehicle made was affected) it would have made them prone to be taken over by BMW and jeopardize the "marriage from hell" merger with Chrysler as MB was bleeding money during the 90s with the huge investment in their W140 S class and the relatively low sales over the predecessor W126 along with the image problem MB faced as being a old & stodgy brand.

 

Do the replacement harnesses last any longer than the originals?

 

The replacement harness do not have the issue as the insulation material is no longer soy based.