M157 Technical Service Bulletin on spark plugs
#1
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M157 | Technical Service Bulletin on spark plugs
Hey guys, never saw this actually posted anywhere on the forum so figured id add the document here for reference for current and future members. Thought the more articles we have on here and more knowledge we spread, the better decisions we can all make.
Hence the call for OEM plugs and being very specific when torquing them. Plug has to be a specific length, and when tightened to tq spec, has to be facing the direct injector in the cylinder chamber up 45 degrees either way from it.
Tech service bulletin from Mercedes AMG
Hence the call for OEM plugs and being very specific when torquing them. Plug has to be a specific length, and when tightened to tq spec, has to be facing the direct injector in the cylinder chamber up 45 degrees either way from it.
Tech service bulletin from Mercedes AMG
Last edited by 5soko; 10-07-2019 at 06:50 PM.
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Just providing information that the techs at MB have that us customers should have aswell. The better we are all informed, the better decisions we can all make and move this platform forward Knowledge is power!
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jvakos (09-06-2020)
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E63 SL55 996TT C5Z06
FYI - here’s the PDF from MB about M157 spark plugs indexing requirement since these are direct injection motors and the open side of the electrode needs to be up to max 45 degrees facing the injector (per the doc..not me, just passing along) to avoid possible cylinder damage and converter damage.