How to enter secret green menu in Audi A4, A5, A6, A8 and Q7 with MMI 2G system (MultiMedia Interface). Thanks to this service menu you can change welcome screen, enable optional features (battery level, oil level…), change language coding and adaptation of head unit module, disable regional and software version restrictions to perform firmware downgrade and much much more. All that without VAG-COM, VCDS, VAS or other diagnostic tool.
If you can’t get it work, probably you need to enable the hidden menu with VCDS or Vag-Com
Check out more at http://mr-fix.info/audi-mmi-2g-hidden-green-menu-description/