S65Bingo

2007 S65 starts and runs fine until I give it peddle to kick in the turbos then the engine bogs down , runs very rough until I stop and restart it, then it runs just fine again. Odd thing is I can slowly accelerate up to 80 90 100 and more it she runs fine. Only when nail it from say a 50mph punch then it happens...engine light will come on and I scan codes and it tells me multiple misfires.

vincheung

99% sure its the coil packs, common on your generation s65. Below link will take you to the right forum, do a search or put out a fresh post and i'm sure you will have more people chime in with a better diagnosis.

https://mbworld.org/forums/s55-amg-s...-w220-w221-52/

MBS63AMG

My 2017 did the same thing on two occasions in the same day when it had just over 70K miles on it. Misfired but the shop said there was nothing they could do. I did fill the tank that morning and thought that maybe it had water in it but now that I've read many stories similar to this, I believe it is the coil packs. It didn't happen again for another 10K at which time, for another reason altogether, I traded it for an S560.

JohnLane

Many Bent-12 coil pack issues have been solved via a trade-in!

I’m glad for the 222 S-65 having individual coils firing each pair of spark plugs. About time!

S65Bingo

Here's an update on my S65...the coil on # 7 cylinder was toast, the coil tubes for # 7 were scorched inside. Another issue my tech found was wrong plugs were installed when the coils and plugs were changed just prior to my buying the car. Go Figure!! The plug they used was NGK BKR6EGP...this plug is meant for Toyota Honda and the like, not a HYPO engine such as S65....NGK IFR6QG....he replaced the coil and all plugs....1500 miles later all is still good