I've got a March 2012 Leon FR 2.0tdi CR 170 DSG, thought I'd post some MPG figures
Just driven steady the last tank of fuel and got 581 miles before I needed to fill up with 100 miles to go according to the fuel computer. To fill to the brim took 48.26 litres or 10.61 gallons, which equates to 54.75mpg, the fuel computer lied and claimed 56mpg but not too far off. With a 55 litres tank that would give a theoretical range of 662 miles.
I have to say though that usually i get around 500 miles to tank which works out to aroung 45mpg, not great but I think combined with a DSG it's normal.
I will add that in my old passat, a 2008 1.9tdi saloon I used to get 55mpg average and driven like 'Miss Daisy' like I just did with the leon I could get close to 65mpg. It was quite a bit slower than the leon with 105bhp vs the leons 168bhp but still that's quite a big difference considering it's a larger car.....the Leon's way more fun though.