W124 Engine bay wiring looms - MBClub UK

andy_k · 15-04-2009, 02:20 PM

It seems that a lot of these looms are now reaching the end of their lives - replacement is the easiest (but costly) option.

To help soften the blow, I've had a word with my local dealer who previously offered us a 'club discount' of 15%. Not much improvement really but they've agreed to give us 17.5% off retail which is pretty good. No need to haggle with your own dealer, this offer is open to all and should get the cost down to around £500 + VAT

If you need a new loom, call Dennis on 01323 465030 (direct number to MB Eastbourne parts)and tell him you got the number from MB Club or me . Make sure you have your chassis number handy as there are several different looms depending on which options were fitted to your car. They'll arrange postage etc or if you prefer, I can arrange to get them collected and shipped on to you

Hope that helps a few people

Andy

andy_k · 15-04-2009, 02:24 PM

can someone sticky this thread as it's a recurring problem?

aka$h · 21-07-2010, 10:56 AM

Quote:

Originally Posted by clcheapshoes520

why did have this prolems

in an attempt to be more enviroment friendly MB used bio degradable insulation on the looms. This insulation didn't fair too well with age and high temps.

NW_Merc · 21-07-2010, 11:06 AM

I know this is about W124 wiring looms. I have a W202, would this problem affect my car? It's a '94 with the m111 engine 4 cylinder.

d w124 · 21-07-2010, 11:13 AM

Quote:

Originally Posted by NW_Merc

I know this is about W124 wiring looms. I have a W202, would this problem affect my car? It's a '94 with the m111 engine 4 cylinder.

No,only the later m104 engines witch on the C class is 280

Tonison · 27-09-2010, 09:23 PM

Hi guys, relatively new to the club but I've been reading alot of the posts, very informative. I have been spreading the good news to other MB owners who are not clued on to this. My car is 1996, 124, do I need to worry about the wiring looms failing, or what are the symptoms of a failing loom?

d w124 · 27-09-2010, 09:39 PM

Quote:

Originally Posted by Tonison

Hi guys, relatively new to the club but I've been reading alot of the posts, very informative. I have been spreading the good news to other MB owners who are not clued on to this. My car is 1996, 124, do I need to worry about the wiring looms failing, or what are the symptoms of a failing loom?

Hi there Tonison and welcome to the forum

.There`s is no need for you to worry,the one for your engine rarely fails

bolide · 27-09-2010, 09:45 PM

The first part to fail is normally the loom from the ECU to the coil packs. The "valley" between the cams is a pretty hot place and the loom degrades and shorts out, eventually killing the output transistors of the ECU

MB make a loom replacement section for £7 and you'll need three for an M104 engine. The tails are long (2 metres approx) so you should have enough length to go back to the ECU. Alternatively you can join into the loom on the section between the engine & ECU

The replacement sections comprise a plug & two-core cable - which looks suspiciously like mains cable as it is a brown & blue twin-core cable in a black sheath

Nick Froome

d w124 · 27-09-2010, 09:51 PM

Do you have a part nr for that please Nick?

Tonison · 28-09-2010, 12:05 AM

Thanks guys, yeah a part no. will come handy.

hotrodder · 28-09-2010, 03:52 PM

Part # for the coil feed wires is A 202 540 60 81 (first google hit that had a pic). Inchcape describes 'em as 'pin bushing housing' for some reason

Druk · 28-09-2010, 04:21 PM

Quote:

Originally Posted by hotrodder

Part # for the coil feed wires is A 202 540 60 81 (first google hit that had a pic). Inchcape describes 'em as 'pin bushing housing' for some reason

Mercedes call everything that has an electrical thingy on the end as a 'pin bushing'. Somewhat lost in translation perchance?

Tonison · 29-09-2010, 11:59 PM

Many thanks Hotrodder.

OneCarefulOwner · 30-09-2010, 11:21 AM

Quote:

Originally Posted by bolide

The first part to fail is normally the loom from the ECU to the coil packs. The "valley" between the cams is a pretty hot place and the loom degrades and shorts out, eventually killing the output transistors of the ECU

MB make a loom replacement section for £7 and you'll need three for an M104 engine. The tails are long (2 metres approx) so you should have enough length to go back to the ECU. Alternatively you can join into the loom on the section between the engine & ECU

The replacement sections comprise a plug & two-core cable - which looks suspiciously like mains cable as it is a brown & blue twin-core cable in a black sheath

Nick Froome

Would fitting new ones of these stop my E200 S124 from hunting at idle? It's not a constant issue, but I'd still like to get it fixed if it's potentially going to degrade further.

doomloom · 01-11-2010, 02:36 PM

Hi Andy, does this price still stand today please?

15-04-2009, 02:20 PM	#1
andy_k Hardcore MB Enthusiast Join Date: Apr 2003 Location: Bexhill, East sussex Car: Alfa GTV 3.0 Posts: 5,206	W124 Engine bay wiring looms It seems that a lot of these looms are now reaching the end of their lives - replacement is the easiest (but costly) option. To help soften the blow, I've had a word with my local dealer who previously offered us a 'club discount' of 15%. Not much improvement really but they've agreed to give us 17.5% off retail which is pretty good. No need to haggle with your own dealer, this offer is open to all and should get the cost down to around £500 + VAT If you need a new loom, call Dennis on 01323 465030 (direct number to MB Eastbourne parts)and tell him you got the number from MB Club or me . Make sure you have your chassis number handy as there are several different looms depending on which options were fitted to your car. They'll arrange postage etc or if you prefer, I can arrange to get them collected and shipped on to you Hope that helps a few people Andy __________________ <insert smart sounding witty comment here>

15-04-2009, 02:24 PM	#2
andy_k Hardcore MB Enthusiast Threadstarter Join Date: Apr 2003 Location: Bexhill, East sussex Car: Alfa GTV 3.0 Posts: 5,206	can someone sticky this thread as it's a recurring problem?

21-07-2010, 11:06 AM	#4
NW_Merc Banned Join Date: Sep 2005 Location: Over here, sometimes over there Car: 1994 Mercedes C180 classic Posts: 5,935	I know this is about W124 wiring looms. I have a W202, would this problem affect my car? It's a '94 with the m111 engine 4 cylinder.

27-09-2010, 09:23 PM	#6
Tonison Hardcore MB Enthusiast Join Date: Jul 2010 Location: Chelmsford Car: E220 Cabrio, 124 Posts: 105	Hi guys, relatively new to the club but I've been reading alot of the posts, very informative. I have been spreading the good news to other MB owners who are not clued on to this. My car is 1996, 124, do I need to worry about the wiring looms failing, or what are the symptoms of a failing loom?

27-09-2010, 09:45 PM	#8
bolide Hardcore MB Enthusiast Join Date: Oct 2005 Location: Brighton Car: BMW E39 525 Diesel Touring Posts: 3,031	The first part to fail is normally the loom from the ECU to the coil packs. The "valley" between the cams is a pretty hot place and the loom degrades and shorts out, eventually killing the output transistors of the ECU MB make a loom replacement section for £7 and you'll need three for an M104 engine. The tails are long (2 metres approx) so you should have enough length to go back to the ECU. Alternatively you can join into the loom on the section between the engine & ECU The replacement sections comprise a plug & two-core cable - which looks suspiciously like mains cable as it is a brown & blue twin-core cable in a black sheath Nick Froome

27-09-2010, 09:51 PM	#9
d w124 Hardcore MB Enthusiast Join Date: Dec 2008 Location: london Car: 300TE s124 E320 w124 3.6project & 300TE-24 Posts: 10,806	Do you have a part nr for that please Nick?

28-09-2010, 12:05 AM	#10
Tonison Hardcore MB Enthusiast Join Date: Jul 2010 Location: Chelmsford Car: E220 Cabrio, 124 Posts: 105	Thanks guys, yeah a part no. will come handy.

28-09-2010, 03:52 PM	#11
hotrodder Hardcore MB Enthusiast Join Date: Sep 2008 Location: south east Car: '93 320te Posts: 172	Part # for the coil feed wires is A 202 540 60 81 (first google hit that had a pic). Inchcape describes 'em as 'pin bushing housing' for some reason

29-09-2010, 11:59 PM	#13
Tonison Hardcore MB Enthusiast Join Date: Jul 2010 Location: Chelmsford Car: E220 Cabrio, 124 Posts: 105	Many thanks Hotrodder.

01-11-2010, 02:36 PM	#15
doomloom New Member Join Date: Oct 2010 Posts: 7	Hi Andy, does this price still stand today please?

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