Originally Posted by UCrewX5

If you reference http://www.xoutpost.com/articles/all-...ystem-faq.html you will note that V17 translates into 3-1/30 for the MkIII. The latest and greatest OS release for the MkIII is 3-1/63, which any disk V22 and higher will take you to.

When you go past V17 you lose having the OBD displayed on the same screen as the radio, but you gain split screeen and much improved graphics. You will also need the KeyCD when you do the upgrade.

Jeff