in particular, "unknisium manufacturers"
Updated camshaft magnet solenoid leaking?
Thread Starter
Member
Joined: Jun 2006
Posts: 96
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From: NH
2016 E350 4Matic Wagon
Updated camshaft magnet solenoid leaking?
Hello, has anyone experienced an oil leak at the electrical connector on the updated camshaft adjuster magnet / solenoid part # 276-156-07-90?
On my 2016 E350 wagon, all four magnets are 276-156-07-90. Since I bought it used, I don't know if they were replaced, so don't know their age. I checked the connectors on all four and saw no leaking. Also, the M and F connectors on the ECU had no oil leaking.
I checked one camshaft position sensor and it's the old 276-905-11-00, clearly leaking on the electrical connector. For now, I'll replace all four CPS, install magnet pigtails, and monitor the magnets for leaking.
On my 2016 E350 wagon, all four magnets are 276-156-07-90. Since I bought it used, I don't know if they were replaced, so don't know their age. I checked the connectors on all four and saw no leaking. Also, the M and F connectors on the ECU had no oil leaking.
I checked one camshaft position sensor and it's the old 276-905-11-00, clearly leaking on the electrical connector. For now, I'll replace all four CPS, install magnet pigtails, and monitor the magnets for leaking.
Last edited by FireFox31; Aug 18, 2023 at 01:21 AM. Reason: Clarified
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Joined: May 2021
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Hello, has anyone experienced an oil leak at the electrical connector on the updated camshaft adjuster magnet / solenoid part # 276-156-07-90?
On my 2016 E350 wagon, all four magnets are 276-156-07-90. Since I bought it used, I don't know if they were ever replaced. I checked one camshaft position sensor and it's the old 276-905-11-00, clearly leaking on the electrical connector. For now, I'll install magnet pigtails and monitor them for leaking.
On my 2016 E350 wagon, all four magnets are 276-156-07-90. Since I bought it used, I don't know if they were ever replaced. I checked one camshaft position sensor and it's the old 276-905-11-00, clearly leaking on the electrical connector. For now, I'll install magnet pigtails and monitor them for leaking.
It seems newer parts have taken care of this issue, but the truth can only be known by waiting for feedback and "time". Say new parts lasted 50K+ miles, and the new ones last 80K+ miles, it may be the vehicle changes owner, and the counting starts again.
Advice: make it a regular item to check every oil change. If leaking -> replace; otherwise, enjoy your vehicle until next oil change
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From: unbegrenzt
2017 GLE350 4MATIC
And when you buy sensors and magnet, buy them from the dealer. Ignore "part numbers" printed on these parts from "other sellers". Electrical parts in particular are subject to inferior quality in the aftermarket.
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Out Of Control!!
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Do you think we can trust FCP Euro, PELICAN Parts to sell dealer grade -or instead do these distributors have "eBay copy-cats" ... what store can we trust for key engine components (CPS, Plugs, TENSIONERS,.... ) ???
Thread Starter
Member
Joined: Jun 2006
Posts: 96
Likes: 11
From: NH
2016 E350 4Matic Wagon
I clarified my first post. I checked all four magnet connectors and there was no oil in them. The one CPS connector I checked had oil. I bought four new CPS from FCP and will install them. I'm also installing magnet pigtails even though the magnets are the new part number.
Did any of these cars come with the updated magnets?
I trust the quality stores Autohaus, eEuroparts, FCP, Pelican, Parts Geek, RM European, and ECS Tuning. I've spent many thousands of dollars at FCP for my Volvos and am confident in the quality parts I receive. You can also buy from the dealership at https://mbparts.mbusa.com/
Did any of these cars come with the updated magnets?
I trust the quality stores Autohaus, eEuroparts, FCP, Pelican, Parts Geek, RM European, and ECS Tuning. I've spent many thousands of dollars at FCP for my Volvos and am confident in the quality parts I receive. You can also buy from the dealership at https://mbparts.mbusa.com/
Member
Joined: Jun 2018
Posts: 95
Likes: 23
From: NYC
2014 E550 4Matic
For piece of mind, you should also install the sacrificial wire harness. With these installed, the oil would never make it into the engine harness from leaking solenoid magnets. I got them from FCP for $10 each. 5 mins install.
2711500156
2711500156
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Out Of Control!!
Joined: Sep 2018
Posts: 14,663
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From: unbegrenzt
2017 GLE350 4MATIC
The supply chain distribution is extra overloaded with hips of "look-alike" junk parts.
Do you think we can trust FCP Euro, PELICAN Parts to sell dealer grade -or instead do these distributors have "eBay copy-cats" ... what store can we trust for key engine components (CPS, Plugs, TENSIONERS,.... ) ???
Do you think we can trust FCP Euro, PELICAN Parts to sell dealer grade -or instead do these distributors have "eBay copy-cats" ... what store can we trust for key engine components (CPS, Plugs, TENSIONERS,.... ) ???
OIl and oil filters are OK from retail parts shops or ebay, amazon, etc. Everything else = dealer. Especially electrical parts.
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From: FL
2012 E550 sedan 2019 E63 Wagon
I clarified my first post. I checked all four magnet connectors and there was no oil in them. The one CPS connector I checked had oil. I bought four new CPS from FCP and will install them. I'm also installing magnet pigtails even though the magnets are the new part number.
Did any of these cars come with the updated magnets?
I trust the quality stores Autohaus, eEuroparts, FCP, Pelican, Parts Geek, RM European, and ECS Tuning. I've spent many thousands of dollars at FCP for my Volvos and am confident in the quality parts I receive. You can also buy from the dealership at https://mbparts.mbusa.com/
Did any of these cars come with the updated magnets?
I trust the quality stores Autohaus, eEuroparts, FCP, Pelican, Parts Geek, RM European, and ECS Tuning. I've spent many thousands of dollars at FCP for my Volvos and am confident in the quality parts I receive. You can also buy from the dealership at https://mbparts.mbusa.com/
Thread Starter
Member
Joined: Jun 2006
Posts: 96
Likes: 11
From: NH
2016 E350 4Matic Wagon
Thanks, I bought four camshaft magnet/solenoid sacrificial pigtails from FCP Euro for $39. That's cheap insurance in case the updated magnets leak.
At least one of my camshaft position sensors is leaking into the harness. I bought four from FCP for $186. I'll install them once I can find some time to remove the intake manifold. Thanks again for your input.
At least one of my camshaft position sensors is leaking into the harness. I bought four from FCP for $186. I'll install them once I can find some time to remove the intake manifold. Thanks again for your input.
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Thanks, I bought four camshaft magnet/solenoid sacrificial pigtails from FCP Euro for $39. That's cheap insurance in case the updated magnets leak.
At least one of my camshaft position sensors is leaking into the harness. I bought four from FCP for $186. I'll install them once I can find some time to remove the intake manifold. Thanks again for your input.
At least one of my camshaft position sensors is leaking into the harness. I bought four from FCP for $186. I'll install them once I can find some time to remove the intake manifold. Thanks again for your input.
FYI, here is one of the links: https://www.ebay.ca/itm/2011-20-Merc...0-89d79472c580
Thread Starter
Member
Joined: Jun 2006
Posts: 96
Likes: 11
From: NH
2016 E350 4Matic Wagon
Thanks for the link. I did not get the eBay CPS pigtails because I am suspicious of them. I expect that the solenoid/magnet pigtails have a method of preventing the oil from wicking, though I haven't disassembled one to be sure. I don't know how to confirm if the eBay CPS pigtails have that prevention method. If they're simply longer wires with no prevention, it seems like their purpose is to buy you some time for the oil to travel down them before reaching the engine harness. How long would it take for the oil to cross them? We'd have to check them more frequently than that in order to catch a leak.
I've already got oil coming out of at least one CPS to the harness, so it might travel from the harness through the new pigtail and to the new CPS, making it look like a leak. Also, I don't trust the quality of a part that's not from Mercedes or one of their OE parts suppliers. I'd hate to have something like a bad solder/crimp cause high resistance and throw off my CPS readings, causing other problems. For all of these reasons, I'm skipping the CPS pigtails and plan to check them for leaks at every oil change... if I can clean the harness which they already leaked on to,
I've already got oil coming out of at least one CPS to the harness, so it might travel from the harness through the new pigtail and to the new CPS, making it look like a leak. Also, I don't trust the quality of a part that's not from Mercedes or one of their OE parts suppliers. I'd hate to have something like a bad solder/crimp cause high resistance and throw off my CPS readings, causing other problems. For all of these reasons, I'm skipping the CPS pigtails and plan to check them for leaks at every oil change... if I can clean the harness which they already leaked on to,
Member
Joined: Jun 2018
Posts: 95
Likes: 23
From: NYC
2014 E550 4Matic
Thanks for the link. I did not get the eBay CPS pigtails because I am suspicious of them. I expect that the solenoid/magnet pigtails have a method of preventing the oil from wicking, though I haven't disassembled one to be sure. I don't know how to confirm if the eBay CPS pigtails have that prevention method. If they're simply longer wires with no prevention, it seems like their purpose is to buy you some time for the oil to travel down them before reaching the engine harness. How long would it take for the oil to cross them? We'd have to check them more frequently than that in order to catch a leak.
I've already got oil coming out of at least one CPS to the harness, so it might travel from the harness through the new pigtail and to the new CPS, making it look like a leak. Also, I don't trust the quality of a part that's not from Mercedes or one of their OE parts suppliers. I'd hate to have something like a bad solder/crimp cause high resistance and throw off my CPS readings, causing other problems. For all of these reasons, I'm skipping the CPS pigtails and plan to check them for leaks at every oil change... if I can clean the harness which they already leaked on to,
I've already got oil coming out of at least one CPS to the harness, so it might travel from the harness through the new pigtail and to the new CPS, making it look like a leak. Also, I don't trust the quality of a part that's not from Mercedes or one of their OE parts suppliers. I'd hate to have something like a bad solder/crimp cause high resistance and throw off my CPS readings, causing other problems. For all of these reasons, I'm skipping the CPS pigtails and plan to check them for leaks at every oil change... if I can clean the harness which they already leaked on to,
Thread Starter
Member
Joined: Jun 2006
Posts: 96
Likes: 11
From: NH
2016 E350 4Matic Wagon
Is anyone willing to cut open a magnet/solenoid pigtail to determine how it prevents wicking? Then cut open an eBay CPS pigtail to see if it has the same protection and build quality? Without that protection, they seem pointless.
Member
Joined: Jun 2018
Posts: 95
Likes: 23
From: NYC
2014 E550 4Matic
Also at $10 each why would any bother with a eBay knockoff ?
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
If the oil still wicks through, nobody is to blame.
Last edited by JCM_MB; Sep 15, 2023 at 11:59 AM.
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From: Fredonia, WI
2012 E550 v8-Biturbo
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
managed chaos...
Every system is engineered with an Easter-egg that commands expert service -
the pigtails have nothing particular to stop oil-capilarity besides they can be replaced at lower cost than ECM harness.
I reckon plastics on the engine heads get toasted by the limited oil circulation!
the pigtails have nothing particular to stop oil-capilarity besides they can be replaced at lower cost than ECM harness.
I reckon plastics on the engine heads get toasted by the limited oil circulation!
Last edited by CaliBenzDriver; Sep 18, 2023 at 11:09 AM.
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From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
Intermediate connector ( pigtail ) uses male and female tinned copper terminals, that breaks a non stop wire core/strands , where the wire core/strands are the "wick" ( imagine candle wick ) which is
the oil transport mechanism. Actually if the pigtail MALE and FEMALE connector seals are good, even with intermediate connector eventually oil filled up that intermediate connector and oil transport will continue.
However, when the extra pigtail is there and it still has NEW oil traces at its end point, we then replace the leaking magnets solenoid or CAMshaft sensors and that pigtails...hence the same is sacrificial pigtail.
