If you have the TDI 3.0 engine, then you should be covered for the PCV failure issue, as it is emissions related/engine related. You need to go to the Audi TDI warranty site, enter your VIN# to verify your coverage and print out everything it gives you, then download the files as well for future reference. Read it end to end, then read it again to let it sink in.

If you have the 3.0T gasser engine, you are likely screwed if there is no TSB for that specific issue. You can go to the NHTSA website and lookup recalls/service campaigns impacting your car.