Climatronic modes

[DeepPurple]

I'm sure this is really simple but...
What is the order (by increasing cost) of operating modes for this unit?
I think...

OFF
ECON
Blank (by pressing ECON button when in ECON mode)
AUTO

(having been driving around in 'Blank' for a couple of months thinking it was doing well for my mpg!).

Any comments appreciated. Thanks.

[Gavin78]

You've pretty much got it in the right order. 'Blank' mode and 'Auto' mode both engage the Air Con Compressor hence you may see your mpg lower. If you are going to drive with the air con on it's probably worth using the Auto mode as the climatronic will maintain your chosen temperature and vary the fan speed accordingly rather than keep blowing cold air out as you will find in 'Blank' mode.