
Tire explosions can cause death, personal injury or property
damage. Do not allow anyone to stand near, directly ahead or
behind the spinning tire.
Never spin the tires in excess of the 35 mph (55 km/h) point
indicated on the speedometer.
Highway hazards
No matter how carefully you drive there’s always the possibility that you
may eventually have a flat tire on the highway. Drive slowly to the
closest safe area out of traffic. This may further damage the flat tire, but
your safety is more important.
If you feel a sudden vibration or ride disturbance while driving, or you
suspect your tire or vehicle has been damaged, immediately reduce your
speed. Drive with caution until you can safely pull off the road. Stop and
inspect the tires for damage. If a tire is under-inflated or damaged,
deflate it, remove wheel and replace it with your spare tire and wheel. If
you cannot detect a cause, have the vehicle towed to the nearest repair
facility or tire dealer to have the vehicle inspected.
SNOW TIRES AND CHAINS
Snow tires must be the same size and grade as the tires you
currently have on your vehicle.
The tires on your vehicle have all weather treads to provide traction in
rain and snow. However, in some climates, you may need to use snow
tires and chains.
Follow these guidelines when using snow tires and chains:
•Either cable type chains or SAE class S chains can be used.
•Install chains securely, verifying that the chains do not touch any
wiring, brake lines or fuel lines.
•Drive cautiously. If you hear the chains rub or bang against your
vehicle, stop and re-tighten the chains. If this does not work, remove
the chains to prevent damage to your vehicle.
•If possible, avoid fully loading your vehicle.
•Remove the tire chains when they are no longer needed. Do not use
tire chains on dry roads.
2004 Grand Marquis(grn)
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USA English(fus)
Maintenance and Specifications
223

2Add 118 ml (4 oz.) of Additive Friction Modifier XL-3 or equivalent
meeting Ford specification EST-M2C118-A for complete refill of
Traction-Lok rear axles.
3Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the dipstick or on the dipstick
handle. MERCONand MERCONV are not interchangeable. DO NOT
mix MERCONand MERCONV. Refer to yourScheduled Maintenance
Guideto determine the correct service interval.
ENGINE DATA
Engine 4.6L V8 engine
Cubic inches 281
Required fuel 87 octane
Firing order 1-3-7-2-6-5-4-8
Ignition system Coil on plug
Compression ratio 9.4:1
VEHICLE DIMENSIONS (AT CURB MASS)
Vehicle dimensions mm (in)
(1) Overall length 5382 (211.9)
(2) Overall width 1987 (78.2)
(3) Overall height 1485 (58.5)
(4) Wheelbase 2911 (114.6)
(5) Track - Front 1611 (63.4)
(5) Track - Rear 1666 (65.6)
2004 Grand Marquis(grn)
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USA English(fus)
Maintenance and Specifications
228

Code Transmission Description
E Automatic 4–speed overdrive (4R100)
J Automatic 5–speed overdrive (5R55E)
Electric
H One speed electric
D Automatic 5–speed overdrive (5R44E)
R Automatic 5–speed overdrive (5R55S)
Passenger car application:
Code Transmission/Transaxle Description
Front wheel drive manual transaxle
R5–speed overdrive (MTX75)
W5–speed overdrive (M5)
Front wheel drive automatic transaxle
A4–speed overdrive (4F27E)
E4–speed overdrive (4FE)
J3–speed (Mazda)
L4–speed overdrive (AX4S)
P4–speed overdrive (4F20E)
X4–speed overdrive (4F50N)
Y4–speed overdrive (CD4E)
Rear wheel drive manual transaxle
55–speed (Mazda M5)
Rear wheel drive automatic transmission
U4–speed overdrive (4R70W)
A5–speed overdrive (5R55N)
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Maintenance and Specifications
232

MERCURY ACCESSORIES FOR YOUR VEHICLE
A wide selection of genuine Mercury accessories are available for your
vehicle through your local authorized Mercury or Ford of Canada dealer.
These quality accessories have been specifically engineered to fulfill your
automotive needs; they are custom designed to complement the style
and aerodynamic appearance of your vehicle. In addition, each accessory
is made from high quality materials and meets or exceeds Mercury’s
rigorous engineering and safety specifications. Ford Motor Company will
repair or replace any properly dealer-installed Mercury accessory found
to be defective in factory-supplied materials or workmanship during the
warranty period, as well as any component damaged by the defective
accessory. The accessory will be warranted for whichever provides you
the greatest benefit:
•12 months or 20,000 km (12,000 miles) (whichever occurs first), or
•the remainder of your new vehicle limited warranty.
This means that genuine Mercury accessories purchased along with your
new vehicle and installed by the dealer are covered for the full length of
your New Vehicle’s Limited Warranty—3 years or 60,000 km (36,000 miles)(whichever occurs first). Contact your dealer for details and a copy of
the warranty.
Not all accessories are available for all models.
Following is a list of several Mercury Genuine Accessory products. Not
all accessories are available for all models. To find out what accessories
are available for your vehicle, please contact your dealer or visit our
online store at: www.mercuryaccessories.com.
Exterior style
Bug shields
Deflectors
Exterior trim kits
Front end covers
Grille inserts
Headlamps, fog lights and Daytime Running Lamps (DRLs)
Splash guards
Wheels
Interior style
Cell phone holders
Electrochromatic compass/temperature interior mirrors
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Accessories
Accessories
233

Floor mats
Interior trim kits
Leather wrapped steering wheels
Scuff plates
Speed control
Lifestyle
Bike racks
Cargo organization and management
Engine block heaters and blankets
Peace of mind
Airbag anti-theft locks
First aid and safety kits
Full vehicle covers
Locking gas cap
Navigation systems
Remote start
Vehicle security systems
For maximum vehicle performance, keep the following information in
mind when adding accessories or equipment to your vehicle:
•When adding accessories, equipment, passengers and luggage to your
vehicle, do not exceed the total weight capacity of the vehicle or of
the front or rear axle (GVWR or GAWR as indicated on the Safety
Compliance Certification label). Consult your dealer for specific weight
information.
•The Federal Communications Commission (FCC) and Canadian Radio
Telecommunications Commission (CRTC) regulate the use of mobile
communications systems—such as two-way radios, telephones and
theft alarms - that are equipped with radio transmitters. Any such
equipment installed in your vehicle should comply with FCC or CRTC
regulations and should be installed only by a qualified service
technician.
•Mobile communications systems may harm the operation of your
vehicle, particularly if they are not properly designed for automotive
use.
2004 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA English(fus)
Accessories
234

washing ....................................175
waxing .....................................175
wheels ......................................176
wiper blades ............................177
Climate control (see Air
conditioning or Heating) ............33
Clock adjust
AM/FM/CD .................................24
AM/FM/Tape ..............................27
AM/FM/Tape/CD .......................22
Compass, electronic
set zone adjustment .................50
Console ........................................71
overhead ..............................48–49
Controls
power seat .................................89
steering column ........................62
Coolant
checking and adding ..............190
refill capacities ................194, 225
specifications ..................226, 228
Cruise control
(see Speed control) ....................59
Customer Assistance ................144
Ford accessories for your
vehicle .....................................180
Ford Extended Service Plan .168
Getting assistance
outside the U.S. and Canada .172
Getting roadside assistance ...144
Getting the service
you need .................................166
Ordering additional
owner’s literature ...................173
The Dispute Settlement
Board .......................................168
Utilizing the Mediation/
Arbitration Program ...............171D
Daytime running lamps
(see Lamps) ................................36
Defrost
rear window ..............................35
Dipstick
automatic transmission
fluid ..........................................207
engine oil .................................184
Doors
lubricant specifications ..........226
Driving under special
conditions ..................................137
through water .........................137
E
Electronic message center .........67
Emergencies, roadside
jump-starting ..........................159
Emission control system ..........204
Engine ........................................228
cleaning ...................................176
coolant .....................................190
fail-safe coolant ......................195
idle speed control ...................188
lubrication
specifications ..................226, 228
refill capacities ........................225
service points ..........................183
starting after a collision .........145
Engine block heater .................126
Engine oil ..................................184
change oil soon warning,
message center .......................184
checking and adding ..............184
dipstick ....................................184
filter, specifications ........187, 224
Index
236

Rear window defroster ...............35
Relays ................................146, 153
Remote entry system ...........74, 76
illuminated entry ......................78
locking/unlocking doors ...........75
opening the trunk .....................76
panic alarm ...............................76
replacement/additional
transmitters ...............................78
Roadside assistance ..................144
S
Safety Belt Maintenance ..........103
Safety belts (see
Safety restraints) ............90, 93–97
Safety defects, reporting ..........174
Safety restraints ..............90, 93–97
belt minder ...............................99
extension assembly ................103
for adults .............................94–97
for children .............................111
lap belt ......................................98
safety belt maintenance .........103
warning light and chime ....98–99
Safety seats for children ..........114
Seat belts (see
Safety restraints) ........................90
Seats ............................................86
child safety seats ....................114
front seats .................................86
SecuriLock passive
anti-theft system ...................82–84
Servicing your vehicle ..............181
Setting the clock
AM/FM/CD .................................24
AM/FM/Tape ..............................27
AM/FM/Tape/CD .......................22Spark plugs,
specifications .....................224, 228
Specification chart,
lubricants ...........................226, 228
Speed control ..............................59
Starting your vehicle .......123–124,
126
jump starting ..........................159
Steering
speed sensitive .......................132
Steering wheel
controls ......................................62
tilting .........................................47
T
Tilt steering wheel ......................47
Tires ...........................153, 211–212
alignment ................................219
care ..........................................217
changing ..................153, 155, 159
checking the pressure ............217
label .........................................217
replacing ..................................222
rotating ....................................219
safety practices .......................222
sidewall information ...............213
snow tires and chains ............223
spare tire .................................154
terminology .............................212
tire grades ...............................212
treadwear ........................211, 221
Towing .......................................140
recreational towing .................143
trailer towing ..........................140
wrecker ....................................165
Traction control ........................130
Traction-lok rear axle ...............137
Transmission .............................133
Index
239