I used to have the
lower power version of this...2.0TDI DSG 150 2013 model. Car at that time had about 6-7k miles on clock.
On a trip from London to York (circa 300miles), average was 57mpg, going around 70-75mph on mostly highways. At around 70mph cruisecontrol, indicated instataneous mpg is around 63ish mpg, at 75mph around 57mpg or so.
On a Sunday morning going from East London to West London via Kings Cross area (13 mile journey), eg..urban area but light to medium traffic...I get 46-50mpg from start average.
Please note, I only use Shell/Esso regular diesel, and once in awhile Shell V-Power Nitro Plus. I've put Tesco fuel once, and mpg was the worst ever on my regular trips indicated by trip computer.
Esso & Shell Vpower Nitro+ Diesel gave me best mpg. I can't feel any difference, between Esso, and the 2 Shells power or refinement wise, but on Tesco regualar diesel, engine felt more grumpy and unwilling.