2009 Mercury Sable Owner's Manual - Page 87

Driver Controls Usually, when something affects the compass readings, the compass will correct itself after a few days of operating your vehicle in normal conditions. If the compass still appears to be inaccurate, a manual calibration may be necessary. Refer to Compass zone/calibration adjustment. Most geographic areas (zones) have a magnetic north compass point that varies slightly from the northerly direction on maps. This variation is four degrees between adjacent zones and will become noticeable as the vehicle crosses multiple zones. A correct zone setting will eliminate this error. Refer to Compass zone/calibration adjustment. Compass zone adjustment Perform the following steps on an open area free from steel structures and high voltage lines. For optimum calibration, turn off all electrical accessories (heater / air conditioning, wipers, etc.) and make sure all vehicle doors are shut. 1. Turn ignition to the on position. 2. Start the engine. 3 2 1 15 3. Determine your magnetic zone by referring to the zone map. 4 14 13 5 12 6 7 8 9 1011 4. Press the SETUP control repeatedly until the message center says "RESET FOR ZONE SETTING". 5. Press the RESET control to enter Zone Setting mode. 6. Press RESET repeatedly until the desired zone setting is displayed. The message center will automatically exit zone setting mode if enough time passes without pressing a button. 87 2009 Sable (mgo) Owners Guide, 2nd Printing USA (fus)