Dash Display - Check Systems -'95 90S

[Mark Byrum <markbyrum@erols.com>]

Have a '90 100 (non-q) w/check system display on dash; upon pushing
button, goes through icon display of oil-can, brake shoes, water geyser,
etc., ultimately conforming things are "OK".  Recently purchased '95 90S
which shows same/similar display box in center of dash and check system
feature allegations in owners manual.  Four buttons on dash, furtherest
one on the right almost flush with the glass/plastic.  Is display
supposed to go through the same song & dance as the one on my '90 100? 
Which button am I supposed to push?  Can't find any reference in the
owners manual as to the almost flush button on the far right; what does
it do?  All help greatly appreciated.
	Very Respectfully,
	markbyrum@erols.com
'86 4kq (163K)
'90 100 (98K)
'95 90S (23K)