Not sure if this will help but in my haynes manual which only goes upto W reg (2000) it says - Service indicator restting, Note if the milage before the next due service is less than 1250 miles,the spanner symbol on the display will flash each time the ignition is switched on.Within 10 seconds of switching on the ignition,press the re-set button below the speedometer,and hold the button depressed untill the number of miles displayed begins to flash.Hold the button depressed - the number of miles on the display will move left,along the display,and the figures for the re-set valve will appear on the right of the display.Continue to hold the button depressed untill the desired re-set number is displayed in its entinety,then release the button.