Hello everyone, I have a 2008 Mercedes e350 that was idling pretty rough, so I decided to change the spark plugs. After driving it around, a check engine, the light came on, and I could not accelerate as fast as usual. I used a scanner, and the code I have was p2006 which means that the Intake Manifold Runner Control Stuck Closed Bank 1. I'm not even sure why this happened because I didn't mess with my intake manifold at all. Wondering if anyone else ran into the same problem and can help.

 

Sounds like you’ll need to replace the intake manifold. Just search for M272 intake manifold and you’ll find the common issues and fixes.

 

Have a quick look at this video


I currently have P2004 because the plastic piece is broken, and I need to change it for the metallic repair kit available online. The video shows other cases where the intake may get stuck. Perhaps you moved/left something that prevents the flap's arm's mechanism to return (hopefully instead of a broken part).

Take a flashlight, remove the engine front cover, both are better, and shine the flashlight at the front of the intake manifold. You can try softly moving the passenger-sided flap mechanism, if it moves freely there is a broken piece in the mechanism and you can try to see if it is the external part or further inside the manifold.

It is not a trivial fix since taking the intake manifold out is a tedious process, but it is not rocket science. I understand it is a minimum 4 hours job + part; therefore, at the dealer would be @$1200+.

https://www.fcpeuro.com/products/mer...kaArcYEALw_wcB

https://mbparts.mbusa.com/oem-parts/...Y2LWdhcw%3D%3D


Here is a video showing the process (there are others online as well)

NOTE: I moved the flap in the stuck Open position. The engine idles great and runs smoothly at all speeds. Except for the P2004 code, no CEL light at all. However, I will definitely change it once the weather cools down a bit.

Good luck

 

The repair kit is a short term fix. The flaps are getting gummed up from oil in the intake. Eventually the flaps get so gummed up that pieces of it will break off and damage the engine. That's why you want to replace the intake if you intend to keep it for a while. The levers and arms breaking are a warning sign that the flaps are getting gummed up. By replacing them with metal ones that won't break, that will eventually just force the flaps to break and fall into the engine. I think someone on here claimed that somehow they got the dealer to it for a tad over $200, found it hard to believe but when I mentioned it to my mechanic he agreed to do it for $200 but I think he regretted that afterwards as it took him the 4+ hours to do it. The intake uses tuned intake runners, the flaps switch from long to short runners depending on engine rpm. Maybe it runs fine because you're in the setting for low rpm and never really hit high rpms. Once cause of oil getting into the intake is the oil separator, oil breather cover. FCPEuro also sells a breather kit but I think you really just need to do the oil separator and breather cover, those go the most often. The oil separator going bad is probably what causes oil to get into the intake instead of oil fumes.

https://www.fcpeuro.com/products/mer...kit-oem-515810

 

Thank you for the advice.. Definitely, I will look at the intake overall before committing to the metal actuator, or a new intake.

I think the actuator is nothing else but a mechanical fuse in case the flaps get stuck (as you clearly indicated), but I am getting the impression the actuator is failing due to high cycle fatigue within a high-temperature environment, and not necessarily the flaps getting gummed up. If there were that much oil being ingested, I am sure other symptoms would show up earlier.

The thing though that irks me a bit with MB engineering of this intake is that an air filter is added to prevent foreign objects to be ingested into the engine, but they purposely design a part internally that can be ingested w/o warning --> Poor, very poor engineering ( I am an engineer and my colleagues will NEVER approve such a design ). They purposely added a failure point within a critical component (with a fuse), and it is not even listed as a wear mandatory service item.