hi john,try this on the lefthand side of your dash their's a plus & a minus button with a button below them with i think a symbol zero on it,switch ignition on & immediately press zero button twice,then switch ignition off,press & hold the zero button while swtching ignition on,after 10 seconds the new interval will appear in the display accompanied with a beep.release the zero button & switch ignition off.hope this help's
steray, January 2010
