thanks again, also found this post link
BMW X5 E53 Cold start problem - no start
https://www.youtube.com/watch?v=kU_ejgj8XLs
Hi Sonny! Turned out to be a faulty relay feeding power to the electric diesel pump. It worked just intermittently when temperatures went below freezing. They changed it and the car has started every time since, in all temperatures.
Thanks for stopping by:-)
PS Gonna search through a post here I jsut dug up
http://www.xoutpost.com/bmw-sav-foru...-mornings.html