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W222 S65 - misfiring?

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Old 06-01-2022, 08:11 PM
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1991 BMW 850CI J-Spec. 992 911 C2S, 03 W211 E55 AMG (sold), 06 CLS55 AMG (sold), 15' S65
W222 S65 - misfiring?
Hey guys. 2015 W222 S65 AMG owner here. I think I’m having a misfire. Haven’t had the opportunity to have it diagnosed yet. The car only feels like it’s misfiring at idling range after it’s fully warned up. It’s not a crazy misfire where the whole car is shaking, however I do feel it.
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Old 06-04-2022, 11:11 AM
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2016 Mercedes S63 4matic sedan
Did this happen after refueling. Possibly bad gas. Just a thought. Have you had all proper maintenance done on the vehicle, especially when spark plugs are due. Just some ideas I am trying to throw out. Hope it gets resolved quickly.
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Old 06-04-2022, 11:45 AM
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GLC Coupe, S63L W222
I would check the following:
  • Spark Plugs
  • O2 Sensors
  • Try refuelling after tank is empty ,could just be bad gas like someone suggested above.
  • Injectors
  • Cam Shaft Solenoids/Sensor
I had misfire issue and mine was catalytic o2 sensor upstream, replaced and no issues.
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Old 06-07-2022, 10:14 PM
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2018 S63, lowered
It’s likely a coil pack. Very common on the V12’s.
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Old 06-08-2022, 03:05 PM
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'94 SL600,'05 SL600,'06 S65,'07 E63,'14 E63S,'09SL600 all sold, ‘15 S65,‘18 E63S,'17 SL65, '17S65Cab
W222 S65’s do not have coil packs. They use individual igniters that almost never fail. Same with the R231 SL65’s and other V12’s beginning in 2013.
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Old 07-31-2022, 01:11 PM
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222 S-65
OP did you give it two dozen spark plugs yet?
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