Spark plug mix and match

Discussion in 'Parts, Maintenance & Servicing' started by clk320x, Jun 13, 2017.

  1. clk320x

    clk320x MB Club Veteran

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    Hi guys,

    I need to have my spark plugs changed on my V6, (12 plugs)

    Kindly a member of the forum sent me the P/N for my plugs using EPC (to my Vin)

    I saw an auction on eBay for 6 genuine MB plugs, brand new in the box. So I put in a bid and won them at £15 delivered (like to eBay auction, please see pics: https://www.ebay.co.uk/itm/172711045877)

    I then ordered the remaining 6 at MB Edinburgh they processed the order using my reg. and got them for £49.23 again delivered next day (excellent service by the way)

    My question is..

    The ones from eBay are manufactured in 2009 and are made in USA, p/n is A0041595003
    (Photo from listing)
    [​IMG]

    The ones from the dealer are manufactured this year and made in Japan, they arrived today however the p/n is A0031599403

    [​IMG]

    How can these numbers be different? I havnt got the eBay ones in person yet but they look identical.. the p/n I got was from the EPC from my Vin.. I then pasted this into eBay and ordered

    MB just did it via my reg

    Both of them have a different p/n and the ones from eBay are made in USA in 2009 and the MB ones in Japan...

    My engine is a M112 3.2L V6 (2003)

    Can anyone help?

    Cheers
    Abs
     
  2. OP
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    clk320x

    clk320x MB Club Veteran

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    [​IMG]

    Update: this is the EPC

    Both part numbers are shown ?

    Would it be okay to fit 6 of each? How can there be 2 parts for the same Vin?

    Thanks

    Also I must thank both Bob and MarkJay for always helping me out with EPC :)
     
    Last edited: Jun 13, 2017
  3. grober

    grober MB Club Veteran

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    I imagine that the different MB numbers simply reflect a different manufacturer/country of origin. Your 2 part nos are listed as "optional" with each other rather than "replaced by" which might be relevant-- irrc the first plugs were multi electrode and replaced by the later fine tipped iridium plugs which resist fouling better. Because these twin plugs [ single exhaust valve twin inlet valve "dual flame front" heads had better emissions] fire simultaneously I would do as your title suggests one of each plug type-older/newer in each cylinder. :dk:
     
  4. 190

    190 Hardcore MB Enthusiast

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    MB don't make spark plugs so are there any other markings on the plugs themselves e.g. if they were made by a NGK or Bosch is there a type number. In fact if there is a type number it will tell you who made the plugs because each manufacturer uses a recognisable numbering system. What the type number can also tell you is the heat range. In principle if the heat range is the same for both sets of plugs there should be no problem using them.
     
  5. OP
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    clk320x

    clk320x MB Club Veteran

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    Hi guys

    So as both of the p/n are current and not 'replaced' in thinking it should Be ok

    Why not fit one set for 3 cylinders and another for the other 3. That way they don't interfere with each other

    Shouldn't they be identical anyway?

    I may just order another 6 from MB if it'll be an issue to be honest
     
  6. grober

    grober MB Club Veteran

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    As 190 says the important thing is they are the correct heat range. People have been known to run their engines on Heinz 57 variety plugs from different manufacturers but as long as they are the correct spec/heat range for the engine there are generally no ill effects. As they are both listed in the EPC under your vin there should be no problem. If there are minor differences my set up has the advantage of making every cylinder the same but to be honest any difference is highly unlikely
     
  7. OP
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    clk320x

    clk320x MB Club Veteran

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    Hi Grober

    As they list both under EPC I hope as you say they will be fine

    Neither have been 'replaced'

    When the Ines from ebay arrive I'll give them a proper 'side by side' comparison and then update this

    I wish I'd sent MB the actual p/n instead of the registration.. I thought there would only be one type :(

    Cheers
    Abs
     
  8. OP
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    clk320x

    clk320x MB Club Veteran

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    I've also emailed Mercedes to inquire about this.
     
  9. bob6600

    bob6600 Hardcore MB Enthusiast

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    As long as they are all listed under your VIN they will be fine.

    Even if they were replaced by, it just means a supplier change (as mentioned) or modification. I always try and go for the most recent number if possible
     
  10. markjay

    markjay MB Club Veteran

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    1. Each of the two type of plugs will have the plug manufacturer's and part number (not MB) stamped on it. If you can post a photo of these then it would be easy to see who is the actual manufacturer and what are the spark plug's spec for this model.

    2. Not a good idea to order parts from MB based on the car's reg.... always better to do your homework first then order the items you need based on the MB part number you want.

    3. Said that.... as others said, as long as EPC says it's OK, then it will be fine to use the plugs you currently have.
     
  11. OP
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    clk320x

    clk320x MB Club Veteran

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    Hi MarkJay,

    When I get the others tomorrow I will take a photo of them properly

    Regards
    Abs
     
  12. merc85

    merc85 MB Club Veteran

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    Just to clear this up, They are a superseded Part number,

    They are the same plug, They are Platnium long life plugs, Both Number's X refer to the correct Bosch plug

    Which is: 024 223 0500
    Trade code: +45

    Out. Thr.:14, Thr. L.:19, Thr. Pitch:1.25,
    Bosch torque for the plug is 28nm


    Hope the above helps, You only have to ask btw ;)
     
    Last edited: Jun 13, 2017
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  13. markjay

    markjay MB Club Veteran

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    Looking it up on the Internet (not conclusive):

    A 003 159 94 03 = NGK PFR5R-11 https://www.ngk.com/product.aspx?zpid=9913

    A 004 159 50 03 = Champion KC10PYPB4 Federal-Mogul Motorparts

    So it seems that it is the same spec of plug but made by different OE manufacturers (i.e. one made in Japan by NGK, the other make in the USA by Champion) .
     
    Last edited: Jun 13, 2017
  14. OP
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    clk320x

    clk320x MB Club Veteran

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    Cheers Gav!

    Thanks for clearing this up, so these can be fitted as if they were identical? Why would MB Change the number haha how annoying!

    Anyways cheers for clearing it up

    Abs
     
  15. OP
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    clk320x

    clk320x MB Club Veteran

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    Oh... interesting

    Not sure what to do then?
     
  16. merc85

    merc85 MB Club Veteran

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  17. OP
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    clk320x

    clk320x MB Club Veteran

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    Sorry Gav I'm just so confused right now lol

    so I'm your opinion do I get these fitted? If so in any specific format such as 1 each per cylinder?

    Would you fit them to your car?
    Cheers
     
  18. merc85

    merc85 MB Club Veteran

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    They will be fine to fit, They will fit and function as intended.

    But id only Fit a "Complete set" from the Same Manufacture if it was mine as i'm abit funny like that lol.

    12 of either number would be ok for me. (sorry you did ask lol)
     
    Last edited: Jun 13, 2017
  19. OP
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    clk320x

    clk320x MB Club Veteran

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    Arghhhh :D

    I'm pretty much the same to be honest... want everything to be perfect lol
     
  20. OP
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    clk320x

    clk320x MB Club Veteran

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