Put my A4 B8 3.0 TDI in for its service at Stafford Audi and they lent me an A6 Allroad Bi-TDI. All I can say is OMG!!! If you're fortunate enough to be able to afford one and debating it right now - stop debating and buy it. The engine and gearbox really are one of the best combinations I've ever driven. Gutted to have handed it back right now Stafford Audi have left me with a big grin today!