...just the clarify the location of the heat pump option, as there has been a lot of talk that the heat pump goes where the REX engine lives.
Check out these technical drawings http://realoem.com/bmw/partgrp.do?model ... g=64&fg=18
...and it's clear the heat pump and gubbins are at the front. There may be some ancillary bits for the REX that get in the way (radiator, fuel tank?), however the Heat Pump is not fitted where the scooter engine is!
Ordered ZI3A: BEV i3, 8th Jan - Collected 24th July 14 - United Kingdom
BHGI Neutronic interior, B74 Arravani Grey, ZNP Media pack (for £200), ZWT Winter pack, 4T9 Heat pump, 674 Karman Kardon, 4U7 DC charge, 420 Tinted glass, 2G6 429 alloys.