Yeah when I read the OPs post, I was thinking here we go, leaking Legend this is not going to fare well,let the bashing beginI sent emails to Dilek Gonulay on two different sites. Hopefully she will get them and reply to this topic.
Sorry you are having a Coil Circuit issue. That code has cropped up a few times for people and it usually means bad coil or bad system control unit. Either way, I would politely ask for a replacement Legend. Sounds like you have been through enough.
At least you did not report a leaking issue which is what some on here assumed.
I will say a lot of new Legend users do not realize when you connect the coil cable to the control pod you have to do it in stages, where you push the coil connector in tighten then push the connector in again and tighten some more, you have to do this a few times to get the connector to completely seat into the control housing or you will get the CC error on the Legend screen