When I bought my A3 years back they loaned me a 3.2 DSG so i could test the gearbox. I drove from work (Slough) to home (Southampton) and back again and emptied the tank. So that was about 140-150 miles.
In my defence, it wasn't my car, and it wasn't my fuel :)
On the subject of SatNav, I find it hard to justify the cost if buying new as functionally it's pretty rubbish. If it's on a 2nd hand car then fine, as aesthetically it's an improvement over the standard stereos. I'm still dumbfounded that car manufacturers can't manage to produce a satnav...
What real world mpg are people getting if you try to drive as economically as possible? I know it's not what the cars about but there will be times when this is required.
What are the must have options? Will be buying 2nd hand so won't have the luxury of speccing to order.
I've also gone from a 140 to a 170 (but in a Golf) and the DIS MPG change was huge, but I think the data used for the 170 is 'revised' to that of the 140. Now I use www.fuelly.com to track my REAL mpg.
Why? They never have previously. Audi, like most manufacturers, release base models first and the 'trick' versions come along later, much later in Audi's case. The 8p was launched on..04 or 54 plates. S3 didn't appear until at least 2 years later.