M272 engine intake manifold issue (CLK 280 - 2007)

[ccr32]

Hi all,

Did a search but couldn't find anything come up on PH, but plenty of YouTube guides and the like out there for how to replace the intake manifold on the M272 or M273 engine - I now need to do mine as I have the P2006 code indicating that something is awry, and lo and behold when poking around with a torch I can see that the plastic actuator cam thing on the front of the manifold has snapped, meaning the intake butterflies are stuck in one position (and throwing an EML and code as a result).

I am fairly confident I can give it a go replacing the whole manifold, following some of the helpful videos out there (such as this: https://www.youtube.com/watch?v=9eVh7guroyE), but I'm wondering what to replace it with.

I know that the OE fitment is a Pierberg one, but these are over £550 which I am loathed to spend on a cheap-ish, 100k+ mile, 14 year old car. There are some cheaper alternatives out there (such as this: https://www.123spareparts.co.uk/car-parts/partstec... but wondering if there are any particular brands that people would recommend, and others that I should steer clear of?

I'm assuming the cheapest of the cheap on Amazon should be avoided... ( https://amzn.eu/d/0owP4i8)

Thanks.

ETA: OE part number is A2721402401

[mwstewart]

What about a repair kit https://x8r.co.uk/mercedes-intake-manifold-air-fla...

[ccr32]

Thanks. Yes, I'm considering it, though having read a fair few internet pages about it and spoken to a few mechanics, they generally advise against a repair as you may end up just moving the problem from the cams and actuators on the front of the inlet manifold, to the butterfly flaps actually inside the manifold.

Suffice to say, if one of the internal butterflies fails and ends up in the engine, it won't just be the intake manifold that needs throwing in the bin...

Maybe I'll pull it all off first and have a good look around it, see if it can be cleaned up etc.

[mwstewart]

I haven't seen a documented case of that. Perhaps some folks fitted a replacement arm with a manifold that had other issues; you can easily check flap operation by hand - if they move freely then no problem.

There are also plastic replacement cam/arm sets available if you are worried about upgrading to metal.

[ccr32]

Fair comment. I have been able to give them a little wiggle while still in situ on the car and they seem to be moving freely, so as you say might be worth a go doing the repair rather than a full blown replacement. Would certainly be a fraction of the cost of buying a whole new manifold.