Page 1 of 280
Introduction 4
Instrument Cluster 10
Warning lights and chimes 10
Gauges 15
Entertainment Systems 18
AM/FM stereo 18
AM/FM stereo with CD 20
AM/FM stereo cassette with CD 23
AM/FM stereo with in-dash six CD 28
Climate Controls 34
Manual heating and air conditioning 34
Automatic temperature control 35
Rear window defroster 37
Lights 38
Headlamps 38
Turn signal control 42
Bulb replacement 44
Driver Controls 50
Windshield wiper/washer control 50
Steering wheel adjustment 51
Power windows 62
Mirrors 63
Speed control 65
Moon roof 69
Message center 74
Locks and Security 84
Keys 84
Locks 84
Anti-theft system 92
Table of Contents
1
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Page 37 of 280

•Remove any snow, ice or leaves from the air intake area at the base of
the windshield.
To aid in side window defogging/demisting in cold weather:
1. Select NORM A/C.
2. Adjust the temperature control to maintain comfort.
3. Set the fan speed to HI.
4. Direct the outer instrument panel vents towards the side windows.
To increase airflow to the outer instrument panel vents, close the vents
located in the middle of the instrument panel.
Do not place objects on top of the instrument panel as these
objects may become projectiles in a collision or sudden stop.
REAR WINDOW DEFROSTER
The rear defroster control is located
on the instrument panel.
Press the rear defroster control to
clear the rear window of thin ice
and fog. A small LED will illuminate
when the rear defroster is activated.
The ignition must be in the ON position to operate the rear window
defroster.
The defroster turns off automatically after a predetermined amount of
time or when the ignition is turned to the OFF position. To manually
turn off the defroster, press the control again.
Activating the rear window defroster will also activate the heated mirrors
(if equipped). For more information refer toHeated outside mirrorsin
theDriver Controlschapter.
Do not use razor blades or other sharp objects to clean the inside
of the rear window or to remove decals from the inside of the
rear window. This may cause damage to the heated grid lines and
will not be covered by your warranty.
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Climate Controls
37
Page 226 of 280

PLASTIC (NON-PAINTED) EXTERIOR PARTS
Use only approved products to clean plastic parts. These products are
available from your authorized dealer.
•For routine cleaning, use Motorcraft Detail Wash (ZC-3-A).
•If tar or grease spots are present, use Motorcraft Bug and Tar
Remover (ZC-42).
•For plastic headlamp lenses, use Motorcraft Ultra Clear Spray Glass
Cleaner (ZC-23).
WINDOWS AND WIPER BLADES
The windshield, rear and side windows and the wiper blades should be
cleaned regularly. If the wipers do not wipe properly, substances on the
vehicle’s glass or the wiper blades may be the cause. These may include
hot wax treatments used by commercial car washes, water repellent
coatings, tree sap, or other organic contamination; these contaminants
may cause squeaking or chatter noise from the blades, and streaking and
smearing of the windshield. To clean these items, follow these tips:
•The windshield, rear windows and side windows may be cleaned with
a non-abrasive cleaner such as Motorcraft Ultra-Clear Spray Glass
Cleaner (ZC-23), available from your authorized dealer.
•The wiper blades can be cleaned with isopropyl (rubbing) alcohol or
Motorcraft Premium Windshield Washer Concentrate (ZC-32-A),
available from your authorized dealer. This washer fluid contains
special solution in addition to alcohol which helps to remove the hot
wax deposited on the wiper blade and windshield from automated car
wash facilities. Be sure to replace wiper blades when they appear
worn or do not function properly.
•Do not use abrasives, as they may cause scratches.
•Do not use fuel, kerosene, or paint thinner to clean any parts.
If you cannot remove those streaks after cleaning with the glass cleaner
or if the wipers chatter and move in a jerky motion, clean the outer
surface of the windshield and the wiper blades using a sponge or soft
cloth with a neutral detergent or mild-abrasive cleaning solution. After
cleaning, rinse the windshield and wiper blades with clean water. The
windshield is clean if beads do not form when you rinse the windshield
with water.
Do not use sharp objects, such as a razor blade, to clean the
inside of the rear window or to remove decals, as it may cause
damage to the rear window defroster’s heated grid lines.
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Cleaning
226
Page 274 of 280

programming entry code .........92
Keys .......................................84, 97
positions of the ignition .........173
L
Lamps
autolamp system .......................38
bulb replacement
specifications chart ..................44
daytime running light ...............39
fog lamps ...................................39
headlamps .................................38
headlamps, flash to pass ..........39
instrument panel, dimming .....40
interior lamps .....................42–45
replacing bulbs .........................45
Lane change indicator
(see Turn signal) ........................42
Lights, warning and indicator ....10
anti-lock brakes (ABS) ..........180
Limited slip axle
(see Traction Loc) ....................185
Load limits .................................163
Locks
autolock .....................................85
childproof ..................................86
doors ..........................................84
Lubricant specifications ...........263
Lug nuts ....................................207
Lumbar support, seats .............104
M
Message center ...........................74
english/metric button ...............78
system check button ................77
warning messages .....................79
Mirrors ...................................63–64automatic dimming rearview
mirror ........................................63
fold away ...................................64
heated ........................................64
side view mirrors (power) .......64
Moon roof ....................................69
Motorcraft parts ........228, 245, 262
O
Octane rating ............................250
Oil (see Engine oil) ..................234
P
Parking brake ............................180
Parts (see Motorcraft parts) ....262
Passenger Occupant
Classification Sensor .................107
Pedals (see Power adjustable
foot pedals) .................................65
Power adjustable foot pedals .....65
Power distribution box
(see Fuses) ...............................198
Power door locks ..................84–85
Power mirrors .............................64
Power point .................................61
Power steering ..................183–184
fluid, checking and adding ....258
fluid, refill capacity ................263
Power Windows ...........................62
R
Radio ..........................18, 20, 23, 28
Rear window defroster ...............37
Relays ................................194, 201
2008 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Index
274