Just notced you sorted it whilst I was writing this post, I lifted the details from owners handbook
Using the buttons below the speedo and rev counter
The left button (S/R for Set/Reset) is used to reset the trip odometer reading, to call up the
test functions and to call up the reset menu for the service interval indicator.
The right button (clock symbol) is used to set the time and to switch the service interval
indicator (remaining distance/service date or vice versa). (To set clock, press and hold button
#2 until hour flashes, then tap to change hour, press and hold again until minutes
appear.)