Ah Gruffle - Audi fuel consumption figures and reality not quite matching? Surely not? A 10-15% error is about right - so you have exceeded that.
Being a diesel and not having the combustion chamber temps of our petrol brothers the engine is going to take a while longer to bed in - fuel economy will improve with miles.
One shouldn't discount that the transmission probably has a capability to learn and adapt to your driving style - so if you have been hoofing your new toy then it will have noted that and done it's best to oblige - not always with economy in mind! It will constantly re-assess and adjust accordingly....
A5 2.0TDI 170 PS S-Line, Cabriolet. Aruba Blue and Blue Roof, Black Alcantara with Silver Stitching, Heated Seats, Auto Dimming Interior Mirror, Servotronic Power Steering, Interior Light & Technology Packs, Tire Pressure Monitor, Parking Plus, Folding Mirrors, B&O, Bluetooth Phone prep, 10 spoke 18" alloys. Road Angel Pro Connected