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M278 spark plug Electrical Coil Connector

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Old Jun 1, 2023 | 08:17 AM
  #1  
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E350 W207
M278 spark plug Electrical Coil Connector

Hello,
unfortunately during my spark plug change one Ingition Coil Broke. Mercedes is not able to Supply the whole coil for 2 month. They can only ship the lower long Part.
I removed the old one and saw that the plate where they connect is not even. Is this normal or is it broken and I need to search for an aftermarket Part?

It is a 2014 S550 M278.

Thanks


Last edited by Jmhm007; Jun 1, 2023 at 08:48 AM.
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Old Jun 1, 2023 | 09:01 AM
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Originally Posted by Jmhm007
Hello,
unfortunately during my spark plug change one Ingition Coil Broke. Mercedes is not able to Supply the whole coil for 2 month. They can only ship the lower long Part.
I removed the old one and saw that the plate where they connect is not even. Is this normal or is it broken and I need to search for an aftermarket Part?

It is a 2014 S550 M278.

Thanks
Aftermarket could work. I would view it as a temporary solution until you can replace it with a dealer-purchased coil. Quality is always a question with aftermarket electrical parts.

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Old Jun 1, 2023 | 09:05 AM
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FCP Euro has Bosch units available for around 50 bucks, that is what I would do. Bosch is a good brand.
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Old Jun 1, 2023 | 09:10 AM
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Bosch is probably who Mercedes buy them from. I remember getting a Mercedes branded and numbered MAF (remanufactured) from AutoZone for my Volvo S80. I thought the guy made a mistake but apparently Bosch makes them for both car companies just bands them differently. So the joke is Volvo's cardboard box costs $50 and Mercedes' cardboard box costs $100.
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Old Jun 1, 2023 | 09:36 AM
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Originally Posted by Crito
Bosch is probably who Mercedes buy them from. I remember getting a Mercedes branded and numbered MAF (remanufactured) from AutoZone for my Volvo S80. I thought the guy made a mistake but apparently Bosch makes them for both car companies just bands them differently. So the joke is Volvo's cardboard box costs $50 and Mercedes' cardboard box costs $100.
2017 coils were made by BorgWarner. It’s standard practice in the auto industry to award length-of-program contracts to suppliers and to single-source components to avoid redundant capital investment in tooling.
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Old Jun 1, 2023 | 09:37 AM
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Originally Posted by Jmhm007
Hello,
unfortunately during my spark plug change one Ingition Coil Broke. Mercedes is not able to Supply the whole coil for 2 month. They can only ship the lower long Part.
I removed the old one and saw that the plate where they connect is not even. Is this normal or is it broken and I need to search for an aftermarket Part?

It is a 2014 S550 M278.

Thanks
Please post a photo clearly showing the printed information on the “potting” of the coil on the other side.
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Old Jun 1, 2023 | 04:31 PM
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E350 W207
Originally Posted by chassis
Please post a photo clearly showing the printed information on the “potting” of the coil on the other side.

I hope you mean this picture. Please let me know if you need something else.
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Old Jun 1, 2023 | 04:47 PM
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I've used Bosch and beru - both work as intended but the beru has more robust plastic housing
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Old Jun 1, 2023 | 09:47 PM
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Originally Posted by Jmhm007

I hope you mean this picture. Please let me know if you need something else.
Yes, thanks that is what I was looking for.

Below is a photo of a new dealer-purchased coil I I installed in my W166 3.5L V6 last year.

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Old Jun 2, 2023 | 03:15 AM
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I was thinking of buying this one. The original is also from beru but the number is diffrent so I dont know if it is exactly the right one.
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Old Jun 2, 2023 | 06:56 AM
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Originally Posted by Jmhm007
I

I was thinking of buying this one. The original is also from beru but the number is diffrent so I dont know if it is exactly the right one.
Buy from a MB dealer.
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Old Jun 2, 2023 | 08:48 AM
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Originally Posted by chassis
Buy from a MB dealer.
I really would. But MB dealer (all MB Germany) is out of stock for next 2 month
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