I have posted a HOW TO for adding the SPORT feature to those R56's that don't have the button.
HUGE kudos to Paul for his write up. I added a few things and the pictures.
I actually did the whole process 2 times for reasons described.

You can access it here along with DOWNLOADS for Datens and tools.

RETROFIT SPORT MODE

 

Make sure SPORT_ANZEIGEDAUER is set to wert_02 ("8") .The translation for this parameter is "SPORT MODE DISPLAY DURATION".

Now I DO have Sport show up on my Tach.
It's in Kombi module.