Fellow S550 owners, please take a minute to read this thread...
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
Took a moment to check out one of my cam sensors and well... let the picture speak for itself. Only thing I can a bit annoyed that i did was I broke a clip on the harness (right side of the yellowish piece) so I took a small piece of electrical tape and wrapped it around the cam sensor and pushed it back into the harness since a small clip that holds it broke so ill have to add this to the list.
Thread Starter
MBWorld Fanatic!
Joined: Jan 2015
Posts: 1,019
Likes: 358
15 S550 4Matic, 86 560SL
Took a moment to check out one of my cam sensors and well... let the picture speak for itself.
Only thing I can a bit annoyed that i did was I broke a clip on the harness (right side of the yellowish piece) so I took a small piece of electrical tape and wrapped it around the cam sensor and pushed it back into the harness since a small clip that holds it broke so ill have to add this to the list.
Only thing I can a bit annoyed that i did was I broke a clip on the harness (right side of the yellowish piece) so I took a small piece of electrical tape and wrapped it around the cam sensor and pushed it back into the harness since a small clip that holds it broke so ill have to add this to the list.
One important question here - what is your mileage?
Because the part does not exist out of eBay. There is no known manufacturer for it outside of ZZPerformance.
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
So if we dont see any oil as of yet then simply installing the harnesses on top and bottom will suffice correct?
Thread Starter
MBWorld Fanatic!
Joined: Jan 2015
Posts: 1,019
Likes: 358
15 S550 4Matic, 86 560SL
Correct. That being said, from the data I’ve seen both the sensors and phasers leak by 70-80k miles. So if you’re close, I’d go ahead and replace them.
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
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Senior Member
Joined: Jan 2019
Posts: 497
Likes: 196
From: Palm Beach, Fl
2016 S550 sport, 2018 GLC300, M3, Zo7, 2021 Sierra Denali
Senior Member
Joined: Aug 2011
Posts: 356
Likes: 19
From: RI
2017 S550 4matic
bought a kit, figure it's cheap insurance given I'm only at 12k miles but it is a 2017. Does this tend to be more mileage related due to mechanical wear or is it time related like seals going bad?
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
Last edited by Rmayrap; Mar 2, 2023 at 08:35 PM.
Senior Member
Joined: Jan 2019
Posts: 497
Likes: 196
From: Palm Beach, Fl
2016 S550 sport, 2018 GLC300, M3, Zo7, 2021 Sierra Denali
I received the ZZperformance kit and will be doing the install this week. The quality is very nice. we shall see if there is oil in there, I am at 48K? Thanks again for all the info.
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
I would say mileage related since most are showing signs of leaking after 50k
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
Oil in harness, not new news.
Affects M274/276/278/157 engines.
Fixable with new sensors and magnets. Pigtails are a bandaid and do not address the root cause. But are helpful.
Affects M274/276/278/157 engines.
Fixable with new sensors and magnets. Pigtails are a bandaid and do not address the root cause. But are helpful.
Thread Starter
MBWorld Fanatic!
Joined: Jan 2015
Posts: 1,019
Likes: 358
15 S550 4Matic, 86 560SL
Unfortunately even the newest revision parts still leak. So I would not say it is entirely “fixable” and the pigtails are just another layer of protection.
Senior Member
Joined: Aug 2011
Posts: 356
Likes: 19
From: RI
2017 S550 4matic
At 12k miles I can easily justify the $100 to throw the pigtails at it instead of adding pigtails, sensors, and magnets if I don't really need all of it.
Junior Member
Joined: Dec 2022
Posts: 28
Likes: 15
From: Oregon
2014 S550 4Matic, 2015 ML400 4Matic, 2019 E450 4Matic Wagon
Well obviously I'm a newbie and an idiot because I can't even get the electrical connectors to release. What is the trick? Stand on 1 leg and stick my tongue out
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
unlock by pushing the white pin away from the plug with a flat head carefully then press down on the released pin and pull away.
Junior Member
Joined: Dec 2022
Posts: 28
Likes: 15
From: Oregon
2014 S550 4Matic, 2015 ML400 4Matic, 2019 E450 4Matic Wagon
YOU Sir are a Gentleman and a Scholar! I've been dinking around with those connectors for 2 hours. I now have 4 sacrificial pigtails installed. Fortunately no oil in any of them. Only 49k on my S550 so that may have helped.
Thank you very much!!
Thank you very much!!
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
you're welcome. Did you install only the sensor harness or only the magnet? I would do both if I were you.
Junior Member
Joined: Dec 2022
Posts: 28
Likes: 15
From: Oregon
2014 S550 4Matic, 2015 ML400 4Matic, 2019 E450 4Matic Wagon
I installed the pigtails on the magnets only. it appears that the sensors are 3 wire and the sacrificial pig tails for the madness are 2 wire
Member
Joined: Jul 2011
Posts: 153
Likes: 55
From: St. Louis
2015 S550, 2014 640i
