Well it is official, I listed the Audi to continue my search for my E53.

[dkl]

All the post face-lift are pretty much the same feature-wise, that is, if you start counting from the late '04s. They had a mid-cycle change for the '04 starting from March that gave you dynamic Xenon, Panoramic Roof, TPMS, etc that all the post face-lift had. All face-lift is xDrive.

I wouldn't worry too much about falling off the carfax grid too much since that may be a good thing (no accident). My car is very well maintained by a few independent mechanics and it too fell off the grid since '08 when my factory warranty/maintenance expired as it never saw a dealer since.