1997 Mercury Grand Marquis Owner Guide 1st Printing - Page 20
1997 Mercury Grand Marquis Manual
Page 20 highlights
Fuel Gauge The fuel gauge The fuel gauge displays approximately how much fuel is in the fuel tank only when the ignition switch is ON. For proper fuel gauge indication after adding fuel, turn the ignition switch OFF while refueling the vehicle. The fuel gauge indicator may vary slightly when the vehicle is in motion. The most accurate reading is obtained with the vehicle on level ground. With ignition switch OFF, the fuel gauge indicator may drift from the ignition switch ON position. When you turn the ignition key to the ON or ACC position, all the display segments will light up, then go off for a second indicating the gauge is working. Then the gauge will show you how much fuel you have in the tank. Engine Coolant Temperature Gauge This gauge indicates the temperature of the engine coolant, not the coolant level. If the coolant is not at its proper level or mixture, the gauge indication will not be accurate. 17