I nabbed this from another forum who's name will remain unmentioned but if you need to reset the service interval indicator here's a method than MIGHT work.

NB: No one can tell me why it works in some vehicles but not others.

With ignition turned off, press and hold LH instrument panel button in the dash area.
With button depressed, turn ignition key to position I.
Continue to hold for five seconds until "SIA reset" appears, then release the button.
It will flash "reset SIA 3600 kms" and "Inspection".
Press the button for another five seconds until "Reset" appears.

Switch the ignition off.

Good luck !
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Now: Range Rover Vogue TD6, JE Stage 1. Tonga

*Gone: Range Rover Sport Supercharged 4.2V8
*Gone: BMW M5 5.0V8
*Gone: Subaru Imprezza Turbo