Mercedes Benz spark plug replacement concerns

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Just wanted to add this bit of info:


The poster did a test with various plugs and torque settings.
 
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Originally Posted by slacktide_bitog
Honda actually did that indexing thing with the first-gen Insight. They list 4 different part numbers for their spark plugs in that application,one for each cylinder. However, the aftermarket only lists one par number. There are no problems with using the same one for all 4 cylinders crzy Is the GLC300 the same engine as the C300? The M274? If so, NGK #90654 should work. Rock Auto lists it for the C300 but not the GLC300, but they may be the same. The notes do mention it being specially indexed.
Normally you'd use the VIN and use EPC to look up the part number. The basic look up on the MB parts websites seem to say 270-159-07-00. You can get a knock version of the EPC/WIS on eBay for around $10. Anyway, once you search for that part number the MB dealers that discount online are cheaper than the aftermarket Mercedes dealers because the aftermarket ones tend to buy MB specific parts from the dealer and then have to mark up them afterwards. Some places that have it cheaper charge more for shipping so sometimes it pays to pay a few cents more and save some extra dollars on shipping but that's also a function of how far away they are from you. When you place the order, include the VIN so that they can confirm those are the right plugs for the car. https://www.mynewbenzparts.com/oem-parts/mercedes-benz-spark-plug-2701590700
This link has been hijacked by someone.
 
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This link has been hijacked by someone.
The part number is in the link. You can just google the mb part number 2701590700 and it will come up with a bunch of hits. MB part seller charge shipping separately so depending on where they are, the lowest price might not be the lowest after factoring in shipping. But here's another source:

 
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When i first read the thread, i thought of the strange plus for Mercedes and VW, Maybe BMW. ITS a strange beast with 2 side electrodes. i used to sell indexing washers back in the day. I believe some hemis required them.
 
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