Adrian052

Yea it is a odd issue. I changed my plugs and coil for #8. I only throw a code when I hit about 6k RPM. Have not checked compression for that cylinder yet, but will soon.

R230-Fanboy

Any news in this thread?

Seems that a lot of people are having issues with the mysterious single cylinder misfire on the M113. (M113.964)

In my case i struggle with the fault code P2058 (Cylinder 8 misfire), and the P2050 (General misfire fault code). It only happens under heavy load, high RPM. The ECU is performing a cylinder shutoff and the engine starts shaking. CEL ON. Ignition off engine restart, everything is fine until next time heavy load is applied, it happens every time. Under normal driving conditions it never happens.

Ignition coil/cables, injector is swapped with other cylinders. Catalytic converters are "knock-tested" and checked with endoscope without finding any problems. Compression test and cylinder leakage test OK. Left valve cover removed and visually inspected rocker arms and valve springs, without finding any obvious problems. Valve seats and cylinder 8 is visually inspected with endoscope without finding any problems.

I have seen somebody mentioning a defective injector driver inside the ECU itself. This seems unlikely, but not impossible? Any experiences is appreciated!

Thanks

idlebumski

after recent oil change my sl55 started smoking white on startup, and my heart sank. mechanic told me to buy coils and plugs for #8, fixed. i think either old cat below it was getting too hot and may be reason they fail there, and/or the bad coil emissions have stressed it, because is smelly now

V8holeinmypocke

I am now having the same problems with my 2001 S500.In the UK we don't need the active cylinder control, most specialists tell the car it isn't fitted and that sorts it.I had a gearbox service done and when it came back after start fuel consumption showed 26.5mpg.Before the gearbox service it showed 13.9 on startup.I asked my "specialist" if he had turned it on by mistake, he had never heard of ACC.If you watch a series of videos by number 27 on you tube you will see what he had done.

96_C280

Any updates on your M113 misfires? I've had a damn cyl 3 and 4 random misfire just above 4k rpms that is driving me crazy. I've done everything but the fuel pump which I just ordered. It's a Hella, hope it's quality. Thanks.

tjts1

You replaced injectors?

johnflight1

I had the same thing going on #3 cyl misfire 2006 M113 eng . I tried everything spent tons of money . What fixed it was the electrical connector going to the coil I replaced them problem gone! They Ohm out good going all the way to the ME computer so it must have been a loose connection , basically just worn out where it plugs into the coil. BTW I soldered them on to assure a good connection.

yMoe

Hi John! I’m thinking about buying a 04 E55 with 110k on it, it has the same problem ( 2 cylinder misfires ) he has done everything but still can’t get it fixed. Have you solved the issue totally and no more issues after that? I’m thinking about buying it and repairing it myself

johnflight1

Never happened again since I put on the new coil connectors. Been about 2 years now.

blaxknose

I have a 03 e320 driving fine then parked for the night after a monsoon of a rain went out noticed light on in interior battery dead after I jumped it car started misfiring and check engine light came on this is the first time it has ever done this now I have changed the fuel pump and bought a new battery and still nothing when it does idle and I give it gas it stalls please help please anybody
o and yeah misfire on cylinder 4 5 and 6 all ove night after a dead battery

vtcc

Did you manage to solve the problem ? I have exactly the same problem (Engine M 113.969 E500 4-Matic 2004 ). The first time the misfire appeared on the highway after a long time under load. Now it repeats every time as described here.

DTC P2050, P2058

Thank you very much for any help.