If it's a 2.5TDI Quattro, then it's NOT a CVT (constantly variable transmission) auto-box, it's a regular automatic (torque converter).
The load on the clutch + gear box is a product of the amount of torque the engine has and the grip: When you have quattro grip + V6 TDI, it means that the clutch + gearbox is stuck between a rock and a hard-place.... Audi have never put a CVT in a quattro, ever. CVT's have eveolved and got a lot better (especially since 2007), so I'm sure there are some additional technical reasons why they m and the clutch is holding ight have trouble getting the drive to the Torsen differential, but even the latest A6's and A7's with the 3.0TDI have Tiptronic (regular auto) on the quattro's and CVT on the FWD versions...
1500rpm is your peak torque, so if you're going to see early signs of the clutch going, then this is when you''d get it.
This is an adaptation of the manual test for a worn clutch, so the auto-owners feel free to correct me on this: but I would suggest to try forcing the gearbox to hold up a gear while getting the turbo to spool up (not even sure if that's possible on an Audi auto, the last "old" automatic Audi I drove was an 80 Cabriolet!).
If it will hold onto a gear (e.g. 4th/5th), while the turbo spools: then the revs should climb steadily with the speed. If the revs slip up in a series of juddering blips while it stays in the same gear, then the clutch isn't holding.
If the juddering is due to it hunting around the box for the right gear, then a softwar fix might help, but NOT if it's for a CVT box