The Nav map updates have to be purchased from either Navteq or Garmin
i do know that with shipping & tax, the upgrade map cd for the NAVTEQ costs $180 give or take a few dollars
Don't think about updating them until at least 3 years has passed, even the dealership told me that
As to the radio updates, the website mentioned above usually knows about them long before the dealership does, i think that is because they have an IN with the radio manufactures.
There is a member in here that can answer most any questions about the current radios, if you should have an issue.
Just post your question, with the radios sales Code, like
2012 RHR mygig radio issue or problem
then in the post say what it is doing
he should see it & ask a couple of questions, then either answer right away or research the answer & then answer it
the new radios for the 2013 models are quite a bit different than the current ones
watch this video to see the new radios features