[GMcL]

Have you tested your battery?
Just because it's new to you does not mean it's fault free.

All week I have had low battery warnings. My voltage is now at 12v cold. Lead acid battery should be 12.6v (2.1v x 6 cells).
Looks like I have a slow dying cell. Today all warnings have gone away just after I've ordered the replacement.

Earlier in this thread there was discussion of a software issue. I rang my dealer before ordering a replacement to make sure all software is up to date on my car.