I'm experiencing these same problems, rough idle on cold mornings for 5-10 seconds on startup. Also a few mornings ago went to start it, it turned over/cranked but didn't start and a yellow ! was displayed along with the little engine management light. I took key fob out then re-tried and started normal
. I've got it booked in at dealers next Friday, still under AUC Warranty so I will report back then.