hi all Audi folks out there,

just joined to see if anyone can help me with my S8 issue!

I'll be brief,

i have had the S8 for 2 years! - never put a foot wrong, till the other week,
i have had sitting for around the 6-7 week mark as i was not using her,

i went to start last week! - and the battery was very low, in fact im sure it was not going to start, however, on its last breath, the car jumped to life,

as it did, the CAT and Airbag light came on, and stay on 95% of time,

the engine sounded a tiny bit off, and after taking it to my local code reader dude, i got conformation that Cylinder 8 was not firing, all plugs were checked, and indeed cyl 8 plug was dirty and charred, so it and all the others were cleaned.

so after a bit of reading, it seems a coil pack was the best item to replace, i did so today, and the issue is still there, i am Stumped and confused,

my opinion - is that something has upset a circuit when the car jumped to life off the weak battery,

fault codes from Bosch ESI tronic
-465a - supply voltage too high
-412c - combustion failure detected.
-4134 - combustion failure cylinder 8 detected.


Thanks in advance for any help!