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I have a 2013 E63 with 95k miles, and it has always been flawless.
About two months ago I noticed a slight misfire at cold start up but would clear up when warm.
On Sunday, the Check Engine light appeared so I assume that it's related to the misfire. I will have it scanned but here are my thoughts...
1) My daily driver, 95% of driving is in manual shift mode, run hard whenever possible.
2) It has always used a lot of engine oil (for the turbos), but always burns clean, no smoke, no leaks.
3) 95k miles on the original plugs, so one or more have begun to foul?
4) Ignition coil(s) or plug wire(s) are failing?
5) Pushed a head gasket (though not using coolant)?
I have a 2013 E63 with 95k miles, and it has always been flawless.
About two months ago I noticed a slight misfire at cold start up but would clear up when warm.
On Sunday, the Check Engine light appeared so I assume that it's related to the misfire. I will have it scanned but here are my thoughts...
1) My daily driver, 95% of driving is in manual shift mode, run hard whenever possible.
2) It has always used a lot of engine oil (for the turbos), but always burns clean, no smoke, no leaks.
3) 95k miles on the original plugs, so one or more have begun to foul?
4) Ignition coil(s) or plug wire(s) are failing?
5) Pushed a head gasket (though not using coolant)?
My guess...fouled plugs. What say you???
omg please get new plugs and coils and continue to enjoy your car .. you've been on borrowed time for 20-30,000 miles!
Thanks to PeterUbers, Mojo20032004, kponti and Savage212 for the responses and info, very much appreciated.
I just removed the engine cover and air cleaner boxes to access the job of replacing the plugs and coils. The mechanical work needed is beyond my knowledge and ability.
It is not that bad of a job. I have a CL and it was all reasonably accessible. The spark plug boots were snug but the right tools made the job straight-forward. If you don't want to do it get a recommendation for a good independent service center and it should not be too bad a cost. Couple of hours max.
Thanks to PeterUbers, Mojo20032004, kponti and Savage212 for the responses and info, very much appreciated.
I just removed the engine cover and air cleaner boxes to access the job of replacing the plugs and coils. The mechanical work needed is beyond my knowledge and ability.
I predict a costly repair bill in my future...
$400 + $200 for plugs and coils and install from a good Indy who knows how to index plugs
I started this post about my E63 with a misfire and check engine warning, last week. At 95k miles, I believed that it was fouled plugs, and you guys suggested replacing the coils too, which seemed reasonable at that mileage. I watched the video that PeterUbers posted, then checked with my MB dealer for parts and labor ($24.50 per plug - $105 per coil - $800 labor = $1,836), and I contacted a local repair shop that suggested it may be a blown head gasket. So I decided to remove the engine cover and filter boxes again to get second assessment of the job. I also checked the air filters that I had replaced in 2020, they were covered with a lot of dead bees, bugs and dirt/pollen (I don't recall running through a swarm of bees). I vacuumed both filters, reassembled everything, purchased two new filters, returned home and installed them.
The check engine light is now off, no engine misfires detected, and it runs very strong again. Obviously, a combustion engine needs a lot of air to run properly, especially the m157. I spent $50 for two air filters and fixed a misfire problem. I was prepared to spend $1,036 on parts alone, and possibly $1,836+ at the MB dealer. I did not have it scanned so that may have identified the air filters as the problem, but I'm not sure if that is a detectable error. Anyway, a very interesting lesson for me...
Thanks for all of the comments and suggestions, very much appreciated! You guys saved my a lot of cash...
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