Does the P400e have a cabin pre-heater as standard, or is it a optional extra?.

No, it has the infamous electric heater, the HVH. It sometimes breaks and, although rather easy to replace, it is expensive...

Okay thanks, I take it the heater can be programmed to pre heat the cabin, just the same as the diesel / petrol heaters?.

Yes, through the menu and the incontrol app.

Click image to enlarge

That's great. Thanks for your help