I was over 100 miles away from home cruising about 80 MPH when I felt car losing its thrust and sure enough CEL was on. I safely pulled over and ran a scan and sure enough another coil has died. I turned car back on twice but continued to see CEL staying on. I called a tow truck and when driver came, he asked what was the issue so I told him and showed him a picture of the scan results. After he uploaded car on truck bed, he told me there was no CEL showing, which he saw as he drove car up the truck bed. After he got me and car home, I started car and sure enough the CEL was gone.i ran a few errands around town and it’s still fine. In the last 18 months, coils 6 and 3 were changed. I have yet to change my spark plugs, so I just ordered 6 coils from FCPEuro and will do the whole job next weekend. Not sure how long it’s going to run before CEL comes back on, I hope just enough until coils get here.

Strange. When I changed my plugs 6 years ago, I got a misfire on #1. Installed another new plug in #1. Same result, new coil, same result. Ran fine, smooth as glass. I just couldn't figure it out. My daughter attended high school with a garage owner in town, so I went there. He listened to what I had done, the code, and cleared the code again with my code reader. Misfire #$1 came back right away. He said, STRANGE. He took the car and his high $$$ scanner for a quick drive, came back 5 minutes later and said the misfire was gone. What did you do? I asked. Nothing, absolutely nothing, just cleared the code again. He gave the car back to me, and it has been good ever since. And he wouldn't take any $$ for the service, whatever it was.

So I hope you find your problem.

Very interesting. I will now have brand new spark plugs, connectors, and coils. I hope that takes care of this it.

I'm getting ready to do my spark plugs replacement this weekend. Now, it's been a while since I changed those plugs on my former 2013 W212. I got the coils and the connectors and I'm not sure if the coils I got came with the connectors as one unit. Do these coils I'm showing here have their connectors? I ask coz I also got separate connectors, and it looks like coils have the connectors attached. I'm a bit confused.

this COP uses your engine harness. Be gentle & keep the surgery clean of dust contaminants.

Boots are a great maintenance part because they have built-in carbon pile... fragile!

Thanks, but my question wasn't answered, did I buy the connectors when they're already part of the coils I'm showing here?

Yes you're using connectors:
coils are built with male connectors
harnesses is build with female connectors

Yes coils generally come with the boot. You can also order them separately as a maintenance item. You can send back the boots you bought separately. If the dont have it, make sure to ad some dielectric grease to the boot.

Watch out when doing #6. On all the other clinders, it isn't necessary to remove the connector if you are just replacing the plugs.

On my car, the wiring to the #6 connector is quite short and the dipstick and the large harness and another thing or two limit the room you have to get the coil in position to with the conncetor attached. The key task for #6 is to remove the wiring connector so that you will have enough room to maneuver the coil and get it to connect with the plug. Then you push down the coil to the block, attach the coil to the block wit the 2 bolts, then put the connector on the coil.

Watch out when doing #6. On all the other clinders, it isn't necessary to remove the connector if you are just replacing the plu

Watch out when doing #6. On all the other clinders, it isn't necessary to remove the connector if you are just replacing the plugs.

On my car, the wiring to the #6 connector is quite short, and the dipstick and the large harness and another thing or two limit the room you have to get the coil in position with the connector attached. The key task for #6 is to remove the wiring connector so that you will have enough room to maneuver the coil and get it to connect with the plug. Then you push down the coil to the block, attach the coil to the block with the 2 bolts, then put the connector on the coil.

Thanks for the hints. Would love to have another set of eyes with me, but will have to do without on this one.