They're having a shortage of parts that fall into options list not part of the packages. 20" wheels, Tobacco Leather, Comfort Seats, etc. Most people did not opt for these kinds of options with the E53. Just-in time manufacturing is harder to manage with no experience with a new model and a million options. While this may cause an inconvenience, no one's gonna jump to a Cayenne or Toureg over something this frivolous.

It is first-year run for this model's new gen. You should expect these kinds of issues along with bugs.