Mine is stock capa (240) manual saloon. It's got 57k on the clock.
On a full tank, I get get about 400-450 miles when the distance to empty shows 0.
I do mainly town driving (not ideal for a 3.0 tdi I know but I love the engine and drivetrain) so I do get more on long runs. I drove to Great Yarmouth and back from mine and got over 500 miles out of the tank.
These cars have a small tank though, I believe it's only 61l on the Quattro