Ones ive seen have the code on a card, if the RNS has been in a car with amp under the seat then the coding will be a mile out, had the same thing on an Octavia today, apples sent me this and told me to try it and it works
code 060004400400002200 and that got the sound working, still cant get the MFSW to play ball and it doesnt see the MDI or Dension so not quite there yet