1996 Mercury Grand Marquis Owner's Manual - Page 98
1996 Mercury Grand Marquis Manual
Page 98 highlights
Temperature display The selected temperature displayed in the window can be set for either 0˚F or 0˚C. Your car may have an English/Metric (E/M) Button to change your speedometer from miles to kilometers. When pressed, this button also changes the temperature display. With or without an E/M Button, the temperature display can also be changed to 0˚F or 0˚C using the MAX A/C and DEFrost override buttons. To change the temperature display to 0˚F or 0˚C, press and hold the MAX A/C and DEF Buttons at the same time for 3/4 second. The display will change. If you continue to press the two buttons, the display will continuously switch between 0˚F and 0˚C. If the temperature display does not agree with the speedometer on vehicles with an E/M button, pressing the E/M button will make them agree. 95