Update:
Bought the new index 11s, replaced and coded them yesterday, reset errors and adaptations and redid them.
Here's how the old ones looked with emphasis on the ones that looked worst.
There was some oil on some of them from halfway down but I guess that's from when I had the leaky VCG. One of them especially had oil with
this white vanilla-like colour to it which I guess is just dust? Neither smelled of anything unusual.
Will have the oil changed and filters replaced this week hopefully.
I started the car up this morning after a ~10h sit and the problem seems to be gone
where there were shakes and idle fluctuations at cold there's no more. Only time will tell though, this week'll be a trial.
I still have the 30E9 error code popping up though, but this will probably be for another thread later on.
Cheers everyone for the help!
