I partially satisfy the STW stereotype (IT and Audi). The car is a 6 year old A6 with 65k on it. I've had it from new so know the history. Recently I think it's getting noisier from the back of the car. Sound like rumbly road/tyre noise from the rear. Noticeable as speed increases. There's no noticeable vibration so it's not a wheel balance issue (I think).
I thought wheel bearings but I've jacked it up this morning and there's no play at all that I can feel though the rear pads are dragging the disks a bit (is this normal?).
I wonder if it's the tyres as they wear, losing shape or whatever? They are pukka Bridgestones so no Cheng slime.
Any ideas please chaps (and chapesses if you know your motoring onions).