M272 3.6 V6 Engine compatibility? R350... - Mercedes-Benz Forum

 
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post #1 of 9 (permalink) Old 07-16-2016, 01:45 PM Thread Starter
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M272 3.6 V6 Engine compatibility? R350...

Hi all,

This question spans multiple models so I hope this is the right section. Short story is, my engine is blown in my 06 R350. What M272 V6's can I source for a used replacement? Obviously I won't consider an 06 as mine died due to a combination of balance shaft and intake manifold failures (flaps broke apart), so I want to avoid the balance shaft issue.

I've been searching and can't find the info. I thought I saw somewhere that ML M272 3.5 V6's are drop in, but I'm not sure of the year range? How about R350s even? Can I use a 2010 or 2011? There are E and I believe C classes with the 3.5 M272, would any of those work?

Thanks in advance...
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post #2 of 9 (permalink) Old 07-16-2016, 05:21 PM
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Any engine made after 2008 should be good. You will most likely have to retain all your external parts though.

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post #3 of 9 (permalink) Old 07-16-2016, 06:16 PM Thread Starter
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Hey thanks for the info. Wasn't expecting a reply so quick. I was expecting to have to use my current engine peripherals; air pump, alt, etc. I've actually separated my intake manifold (the one people on the internet say can't be done) and I plan to make improvements so this incident won't be repeated.

Do you know if there are any ECU differences? So if I pick up a 2010 or 2011 engine, my ECU will work?
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post #4 of 9 (permalink) Old 07-17-2016, 02:50 AM
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I don't see why the ecu wouldn't work. Someone with experience with these engine swaps should be able to weigh in. I suggested a post 2008 engine since there were a few '08's with the balance shaft issue.

2005 S430 4Matic 'Morton' W220.183 • 722.671 Rest in Peace

Bells and whistles are thorns and thistles.
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post #5 of 9 (permalink) Old 07-17-2016, 12:31 PM
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Than since you are making major job, why not go 1 step farther and put diesel in it, to make it 30 mpg vehicle with million mile life span.

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post #6 of 9 (permalink) Old 07-23-2016, 06:52 PM Thread Starter
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Than since you are making major job, why not go 1 step farther and put diesel in it, to make it 30 mpg vehicle with million mile life span.
Swapping an engine isn't a major job for me. Swapping a different one in a vehicle with all these modules and other electronics nightmares is a big job though. Besides, comparable diesels go for 2x or 3x the price. That and there here are too many Mercedes-barriers to DIYers like me, that I would never modify one made after 2000. This is why the Mercedes forums/communities are so vastly different from BMW or Audi forums. When I had a couple Audi's I had VAG-COM and could do any programming/diagnostics the manufacturer could. The STAR system along with all the other pains are designed by Mercedes to keep people locked in buying late model vehicles with warranty... the obvious side-effect is these cars are reduced to being appliances, so their enthusiast base shrinks, ie, people don't rebuild Mercedes engines or find replacements - they send them to the scrap yard. Talking to the local Mercedes indy specialist, it's shocking to hear how often these cars are total losses and scrapped.

Case in-point: no one can answer my question about m272 engine compatibility. When I'm ready to buy, I'm going to consult my local Mercedes indy specialist and I'll post back with what I find out. Thanks for the help anyhow.
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post #7 of 9 (permalink) Old 07-24-2016, 06:55 PM
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Originally Posted by AwesomenesPrime View Post
Hi all,

This question spans multiple models so I hope this is the right section. Short story is, my engine is blown in my 06 R350. What M272 V6's can I source for a used replacement? Obviously I won't consider an 06 as mine died due to a combination of balance shaft and intake manifold failures (flaps broke apart), so I want to avoid the balance shaft issue.

I've been searching and can't find the info. I thought I saw somewhere that ML M272 3.5 V6's are drop in, but I'm not sure of the year range? How about R350s even? Can I use a 2010 or 2011? There are E and I believe C classes with the 3.5 M272, would any of those work?

Thanks in advance...
08-09 ML is your compatible year range. I hope this helps, best of luck with getting the van back on the road.

--Kyle
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post #8 of 9 (permalink) Old 07-26-2016, 05:03 PM Thread Starter
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Thank you Kyle of Groton. lol. So what happened in 2010?
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post #9 of 9 (permalink) Old 09-02-2016, 11:13 PM Thread Starter
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So update for anyone who cares - swapped in a M272 from a 2011 GLK. Checked out the engine, cross referenced the specs and it works. It has the same compression ratio etc and as I heard on another forum an M272 is an M272 at it's core. I needed to swap things like upper and lower oil pan, exhaust manifolds etc, but it bolted up and plugged in fine. Running for now, lol, see how long this one lasts...
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