I enabled the AWD gauge on my SHO. On my 2015, I changed 720-01-02 from 8AFC-4CF0-3F2B to BAFC-4CF0-3F5B. Of course, the last byte is the checksum. Works great, although I rarely use it.
Interesting note, if you have navigation, this also changes the speed limit indicator on the right IP from the US version to the "international" version (white circle with red border).