Thanks Len. This forum rocks! I wish I was plugged in much earlier..
It turns out the wife had left the overhead cabin light ON overnight and that seems to have drained out the 12V battery!!
After jump starting it, the HV battery came to life right away and all's good with it now.
Will definitely replace the 12V. Its a 451 in this car. Still looking through the archives here to see what others have got as replacement..
