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+---- Thread: M112 W220 Missfire (/Thread-M112-W220-Missfire)
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M112 W220 Missfire - Matt1as - 06-07-2026
Hi i got a S350L that gives me some issues
I have missfire on cylinders 1,2 and 3
and because of that its running really rough
ive been told ECU needs replacing
i got star and das diag but i only get those codes
Anyone have wiring diagram for these? or how can i find out what is going on. i opened the ECU but cant see anything burned
RE: M112 W220 Missfire - Anturage - 06-07-2026
Your job is to replace ME or to perform diagnostic and repair vehicle?
RE: M112 W220 Missfire - OM617 - 06-07-2026
Does it always missfire or from time to time?
RE: M112 W220 Missfire - Matt1as - 06-07-2026
(06-07-2026, 03:11 PM)Anturage Wrote: Your job is to replace ME or to perform diagnostic and repair vehicle?
Its my car so repair it so i can start using it
(06-07-2026, 05:45 PM)OM617 Wrote: Does it always missfire or from time to time?
Always
RE: M112 W220 Missfire - Anturage - 06-07-2026
Then perform normal diagnostic and general misfire troubleshooting.
99% problem not in ME
RE: M112 W220 Missfire - Matt1as - 06-07-2026
(06-07-2026, 08:38 PM)Anturage Wrote: Then perform normal diagnostic and general misfire troubleshooting.
99% problem not in ME
ive swapped ignition coils and looked at wiring from me to coils all have "connection" but no spark
RE: M112 W220 Missfire - Anturage - 06-07-2026
What happens on coil terminals?
RE: M112 W220 Missfire - Matt1as - 06-07-2026
(06-07-2026, 09:00 PM)Anturage Wrote: What happens on coil terminals?
Hard to read with multi meter but i get basicly nothing on any pins. cant find pinout either for what im expecting on each pin.
RE: M112 W220 Missfire - Anturage - 06-07-2026
Compare with cylinders working normally. You should have at least Kl.15 up