S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

V-12 Trouble Codes - Help Please

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Old Feb 12, 2016 | 03:23 PM
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'05 S600
V-12 Trouble Codes - Help Please

My 05 S600 has the following codes:
0301 - Cyl 1 Misfire detected
0305 - Cyl 5 Misfire detected
0303 - Cyl 3 Misfire detected
0603 - Internal Control Module Keep Alive Memory (KAM) Error
0203 - Injector Circuit Malfunction
04E2 - Unknown
0300 Random Multiple Cyl Misfire
02E5 Unknown
Codes only show up upon starting in AM after nite in garage.
Upon bad start the engine is terrible and seems to be running on 6 cyl.
When codes are cleared car runs great and starts ok for 5 - 10 starts
After 5 - 10 starts AND a nite in garage codes again.
The misfires seem to say coil issue, but new coils installed (new #'s) about 35k miles ago.
What about the other codes ?
If it was a bad coil wouldn't it always throw codes?
Why does it only happen after approx 10 hours off, and a cold start.
Last but probably most important.. all this on a 4 week old Eurocharged tune.
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