Yay! It finally arrived, after waiting over 4 months. Had to immediately "drive it in" - ran it out of the city up through to Marysville and back. Very nice. I realise now that the previous test drives did it no justice whatsoever. This car is absolutely astounding.
The combined consumption, ie. pretty busy city and suburban traffic, winding hill climbs with some spirited driving, including highway coasting - keeping in mind this 135i is first day on the road - 9.4/100km.
Have to agree with others though, the tank is far too small..