I found some info for you here a little ways down:
http://my.is/forums/f87/official-oem...inside-380603/
"1. M96 sticker equals open Diff.
(auto or manual)
2. M98 sticker equals Locking diff. (LSD)
(auto 3.9)
3. M85 sticker equals Locking diff. (LSD)
(manual 3.7)"