1999 Mercury Grand Marquis Owner Guide 1st Printing - Page 65

Controls and features 3. Press and hold the hand-held transmitter button. 4. The HomeLink௡ indicator light will flash, first slowly and then rapidly. When the indicator light begins to flash rapidly, release both buttons. The previous device has now been erased and the new device can be activated by pushing the HomeLink௡ button that has just been programmed. AUTOMATIC DIMMING INSIDE REAR VIEW MIRROR (IF EQUIPPED) Your vehicle is equipped with an inside rear view mirror which has an auto-dimming function. The electronic day/night mirror will change from the normal state to the non-glare state when bright lights (glare) reach the mirror. When the mirror detects bright light from front or behind, it will automatically adjust (darken) to minimize glare. Do not block the sensor on the backside of the mirror since this may impair proper mirror performance. Press the control to turn the mirror on or off. The mirror will automatically return to the normal state whenever the vehicle is placed in R (Reverse) (when the mirror is on) to ensure a bright clear view when backing up. COMP MIRROR ELECTRONIC COMPASS (IF EQUIPPED) The compass reading will remain accurate during most driving conditions. Unknown to the driver, the compass is continuously recalibrating due to magnetic fields and subtle, slow changes in vehicle magnetics which can occur over the life of the vehicle. The compass reading will remain fixed when significant levels are experienced (such as steel bridges). The compass will return to normal operation upon leaving the magnetized area. If highly magnetized items (such as magnetic mount antennas) are placed very near the compass the display will change to "C" for 15 seconds, then display all segments until the magnetized item is removed. Most geographic areas (zones) have a magnetic north compass point that varies slightly from the northerly direction on maps. This variation is four 65