engine heater this may be bilt in on berling sold in the north .norway .ussr i whood like one in my 2lt hdi i no you can get kenlowe ones but do thay make one that fits in the block to fit from new.
They both make independant heaters which use a small burner to heat the engine coolant.
They can be used with a timer or remote control for pre-heating.
The other type,which is a small electric heating element that is fitted in place of one of the engine block core plugs,uses mains 220v.
A socket is fitted under the bonnet,or behind the grille,and a cable is then plugged in with the other end plugged into a mains outlet.
Not sure who makes this type,but try Bosch or Hella.
2010 XTR in black with bells and whistles
does electrical plug-in heaters, and I think they're also available in the UK.
Berlingo due in June.