E36 AMG project - Mercedes-Benz Forum

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post #1 of 382 (permalink) Old 07-14-2015, 11:24 AM Thread Starter
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Date registered: Mar 2010
Vehicle: 2007 E220CDI, 1990 300E-24V, 1987 W124 200 (3.6 AMG build- ongoing!) 1993 E500 W124
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E36 AMG project

Hi all, I have had a 1987 w124 200 (not e just the 200- carb model) off the road for many years as I was intending to put a 230 Kompressor engine in it. However a wiring harness proved very hard to obtain complete so I kept an eye out for a donor car.

Long story short the car is still sitting but I just bought a donor car. A 1995 C36 AMG saloon. I will be taking the full running gear out of it & building a close as possible e36 replica with a w124 bodykit etc.

Just a quick question does anyone know off hand what parts will be compatable? I intend to swap the rear axle subframe over to the 124 complete. Am I right in thinking the sub frame will fit?

Also I hope to re use the c36 amg alloys & big front brakes. The calipers are 4 pot with AMG cast into them. From what I have read they should fit if I use later lower arms & trim the dust shields?

The car needs a full respray so I will roll the arches etc to suit wheels if required. In a few days I will take the front brakes off the w202 & test fit them to the w124 to see if the bolt pattern even matches up then I'll figure out shimming etc. I do have a good machine shop company I can use only 1/2 mile from my house.

Big project ahead but I am looking forward to it!
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post #2 of 382 (permalink) Old 07-14-2015, 12:04 PM
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Sounds interesting. Looking forward to reading more about the project and seeing pictures.

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post #3 of 382 (permalink) Old 07-16-2015, 04:27 AM Thread Starter
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Wiring Harness woes

Well I have gave myself a good few hours of hell! The engine wiring harness on the C36 engine was toast. All the usual cracked sheathing etc that someone had taped up. I believe it to be the cause of a misfire the car had when it was idling as it seemed to me to be electrical.

It was actually a wonder it even ran at all. Every wire was perished & touching at all sensors - coil packs etc. I am currently rewiring it’s original harness with high quality cable that matches the original gauge exactly. I am good with car wiring & besides, if you only replace one wire at a time you cannot really go wrong as long as you are good with a soldering Iron & PATIENT. You cannot rush a job like that- I will have around 15 hours in soldering alone I reckon.

So it will be running again in a few days- hopefully minus the previous misfire. I want to Donor running perfect before I start the transfer. That way I am not troubleshooting old problems when I fire up the W124.
I have attached a pic of the Donor Motor! I will be taking off the wheels soon & trial fitting them to my 300E-24. (As the W124 this engine is for has no front wheel hubs fitted currently) The 300 24 was fully restored before
http://www.benzworld.org/forums/w124...ed-photos.html
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Last edited by JC220; 07-16-2015 at 04:30 AM.
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post #4 of 382 (permalink) Old 07-16-2015, 04:39 AM
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Keep in mind that the engine harness is only one of several items affected by eco junk wiring. The others are throttle body, lower (starter) harness, aux fan harness, etc
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post #5 of 382 (permalink) Old 07-16-2015, 04:49 AM Thread Starter
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Ok I did see the lower starter harness as well I will remove it when I have the engine & box out of the car. Is the throttle body harness under the intake manifold or where is it located? I will go through all of the wiring I take across to the w124 & also strip out what is not required- A/C etc when Im at it.
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post #6 of 382 (permalink) Old 07-16-2015, 05:03 AM
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Throttle body is in the middle of black platic intake manifold. Visible from above. Look for the manufacturing date (ex: 94M07) which indicates July 1994. Anything prior to 1998 are suspect eco junk candidates
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post #7 of 382 (permalink) Old 07-16-2015, 05:46 AM
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If the upper harness was original, no doubt the ETA will be, too. Every piece of wiring in this car will be Eco-junk, and should be replaced before transferring to your other car.
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post #8 of 382 (permalink) Old 07-16-2015, 06:44 AM Thread Starter
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I have went out to the C36 & taken a pic of a large Plug under the intake- is this the Throttle Body harness? The car has a mechanical Throttle (Cable- not drive by wire) so could this be for the Cruise Control Motor only? In which case I will not be re-using it.

I also noticed that on the main engine harness there is a double pin plug which connects under the manifold. I presume it is the throttle position sensor so what other info does the ECU require from the manifold? Ie- Mechanical Throttle.

I will most definitely be rebuilding the starter / Autobox part of the loom also along with whatever comes out of the dash – ignition wiring. The Donor is ideal as it has a regular key- not the later IR type fob. I will need to remove the dash in a few weeks time and begin carefully removing what I need. I will also need to re-locate the battery in the boot and take over the fuel pumps from the C36.

The car did actually come with a brand new unused boxed Mercedes engine harness which was very close but not 100% correct fitment (It has 1no extra plug on it). Part no A 202 540 22 33. It is worth £1158 from Mercedes so I did not want to alter it in any way. I will ebay it to help fund this project!
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post #9 of 382 (permalink) Old 07-16-2015, 07:52 AM
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Christ.. and here I am trying to sell my great condition 2005 harness for $300.

If its not broken, You aren't trying hard enough.
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post #10 of 382 (permalink) Old 07-16-2015, 01:53 PM Thread Starter
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Wheels!

I have checked the wheels off the C36 which I intend to reuse on the W124;

Fronts 7 1/2 Jx17 H2 ET 35
Rears 8,5J x 17 H2 ET 30

Looking through the forum I think they will fit without issues. (I will be fitting new tyres anyway so the ideal Tyre sizes can be selected) I will test fit them to the other car tomorrow to be sure. I will be lowering this car also so I will more than likely roll the arches anyway to get extra clearance.
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