1995 Cadillac Eldorado Owner's Manual - Page 130

Compass Variance Variance is the difference between magnetic north and geographic north. In some areas the difference between the two can be great enough to cause false compass readings. this happens,follow these instructions to If set the variance for particular location: your 1. Determine your location on the zone Note your zone number. map. 2. Hold in the Cal switch (bottom of the mirror housing) for five seconds until the current zone entry number appears display. To hold in in the the Cal switch, insert a paper clip into thesmall hole on the bottom of the mirrorhousing. 3. Repeatedly press the Cal switch until the number for the zone new entry is displayed. Once the desired zone number is displayed, stop pressing the Cal switch and thedisplay will showcompass direction within a few seconds. 2-59