Do you mean the service indicator? I found this in an old thread:
You also use the ignition switch. There are four positions of the ignition
> key/steering lock:
>
> (0) Off (Locked)
> (1) Off (Unlocked)
> (2) On
> (3) Start
>
> With the doors closed, place your thumb over the (R) button on the lower
> edge of the instrument cluster and get ready. Here we go:
>
> Turn the key in the steering lock to Position (2). Within four seconds,
> press Button (R) twice. The present status for days or distance is
> displayed. Within 10 seconds, turn key in steering lock to Position (0).
> Press and hold Button (R) while turning key in steering lock to Position (2)
> again. The present status for days or distance is displayed once more.
> Continue to hold Button (R). After approximately 10 seconds, a signal
> sounds, and the display shows the reset mileage or distance. Release Button
> (R).
>
>
>