This adds Rally Mode to the base S model. Your KTM dealer need to install a software enabler (P/n 63500910000) at about £175. Rally mode is only software and included on the ‘R’.
There was an interesting chart passed on by KTM to the journalists during the bike presentation in Morocco about what setting to use in which conditions. It was published in this article and reproduced below.
See also the article about riding modes, explaining in details all the modes available with and without the Rally pack.