Hi Mondeoman.
I have a 1998 ford Cougar that is build on the Mondeo chassis,
and belive it or not I also have a service indicator that i whant to reset.
thanks in advans.
you need to hold 2 buttons together for 5 seconds to reset it,
the 2 are found just above the heater dials,just under the air vent.
button 1 ='SELECT'
button 2 = 'UNITS'
hope tis makes sence to you.