That's the one. Do exactly what it says on the tin, don't update and your original BOSE will be retained. Iirc, even with odis, you may need to find actual parameters elsewhere to install. Too risky, too many guys pleading for help on the blogs. I think AIO is setup to not change the Bose. Download, unzip, copy to SD root, and follow Mr. Fix. My only squeaky bum moment came at the very end, when it stalled on 99% on some module, I can't remember the filename but it was to do with radio. I had the choice to exit, retry or continue. I hit continue. Whatever it done, or undone, it finished, and I have AA, Google maps Spotify etc. I tried the same file again just to see, and it showed no modules available for update, happy days. Mine is a January 2015 A6, absolutely very first example of MHI2, and one that Audi won't do. There is a minor issue in that it doesn't see the scrollpad for scrolling maps, but you just type or voice a location. I installed the 2022 maps later, so I have both. Btw, I didn't reset my HDD as advised, on mr.fix. I didn't want to lose all my albums, didn't have the original mp3 files I loaded from, and backing up is not an option. It retained them without issue.