okay its my bad ive just checked again..
" to reset the longlife display manually, witch off the ignition, then press and hold down the trip reset button, and note that the relevant service will appear in the display turn the digital clock reset knob clockwise and the display will now return to normal.... switch off the ignition to complete the resetting procedure. DO NOT "zero" the display otherwise incorrect readings will be shown
there ya go thats the extracts