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Old 01-06-2017, 04:41 PM
Join Date: Apr 2012
Posts: 320
1994 E320 w124 wagon intake manifold rubber boots or tubes and o rings part number

In the Mercedes-Benz W124 E-Class Technical Articles Intake Manifold Removal Mercedes-Benz W124 Intake Manifold Removal | 1986-1995 E-Class | Pelican Parts DIY Maintenance Article and in the figure 25, it says Inspect all the gaskets, hoses and lines for damage or excessive wear and replace as needed. You must always replace the intake manifold gaskets (red arrows). It is always a good idea and cheap insurance to replace the vacuum hoses (green arrow) and rubber boots or tubes that connect the manifolds (yellow arrows). Installation is the reverse of removal. Now would be a really good time to replace any suspect vacuum lines.

My question is what rubber boots or tubes that connect the manifolds (yellow arrows) exact part name and part number?

Also in the same technical article in the top that says Parts Required, it mentioned new o rings. What is the exact part name and part number? In some sections, o rings refers to air conditioner o rings, other says it is the fuel injectors o rings. I need to know exactly what o rings refers to as indicated in the technical article under the Parts required heading. Any comments?

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Old 01-07-2017, 08:45 AM
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Trevor Hadlington
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,357
What engine are you talking about ? M104 ?
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Old 01-07-2017, 11:59 AM
Join Date: Apr 2012
Posts: 320
yes it is an M104 engine
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Old 01-09-2017, 10:47 AM
Registered User
Join Date: Jun 2002
Location: Conway, SC
Posts: 304
Parts List

It's been a while since I've had one of these apart so please excuse any errors or omissions but I believe this is everything you may need. This includes enough plastic vacuum line and rubber vacuum hose to replace most on the engine.

I hope this helps, Robert
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1994 E320 w124 wagon intake manifold rubber boots or tubes and o rings part number-104-intake-parts.png  
Mercedes Benz Master Tech - Retired
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Old 01-09-2017, 12:35 PM
Join Date: Apr 2012
Posts: 320
Hi Robert. Thanks for the attachment in the previous post. I appreciated it.
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Old 01-19-2017, 04:33 PM
Join Date: Apr 2012
Posts: 320
update on the intake manifold and now is low idling

I finally got around to resolve the issue of the high idlinging issue. Both hose nipples on the intake manifold were broken and were replaced by making an adapter hose nipple on each one (also making sure both hose nipples are tight fit as well to avoid air leaks). After starting the engine, I am getting low idling so low it kills the engine.

Troubleshooting on the DM Self Test Diagnostic Module (16 pin) indicated a code 6 meaning Idle speed control faulty. That is the only code showing using the DM.

When I use the code reader to retrieve the codes on the individual pins, the code reader shown these results:

Pin 6, code 9, SRS malfunction indicator lamp (A1e15) or time limit for DTC readout /erasing e

Pin 8, code 8: Idle speed control (ISC) system at upper or lower control stop or CC or EA indicates "limp home" mode

Pin 8, code 13: O2S (Lambda) control system operating at rich or lean limit

Pin 14, code 2: EA/CC/ISC control module (N4/1) or Safety contact switch (M16/1s1) or Stop lamp switch or Cruise control switch or Actual value potentiometer or Starter lock-out/back-up lamp switch or engine speed signal or vehicle speed signal or closed throttle position switch or safety relay in EA/CC/ISC control module.

In addition, my cruise control does not work, either.

I am not sure where to start to resolving these issues mentioned above. Any comments/feedback is greatly appreciated.

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