Page 3 of 256
Maintenance and Specifications 211
Engine compartment 212
Engine oil 213
Battery 217
Engine Coolant 219
Fuel information 225
Air filter(s) 239
Part numbers 240
Refill capacities 241
Lubricant specifications 242
Accessories 248
Index 250
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system or translation in whole or part is not permitted without written
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Copyright © 2005 Ford Motor Company
Table of Contents
3
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Page 9 of 256
Vehicle Symbol Glossary
Power Windows
Front/Rear
Power Window Lockout
Child Safety Door
Lock/UnlockInterior Luggage
Compartment Release
Symbol
Panic AlarmEngine Oil
Engine CoolantEngine Coolant
Temperature
Do Not Open When HotBattery
Avoid Smoking, Flames,
or SparksBattery Acid
Explosive GasFan Warning
Power Steering FluidMaintain Correct Fluid
LevelMAX
MIN
Emission SystemEngine Air Filter
Passenger Compartment
Air FilterJack
Check fuel capLow tire warning
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Introduction
9
Page 12 of 256

Driving a vehicle with the brake system warning light on is
dangerous. A significant decrease in braking performance may
occur. It will take you longer to stop the vehicle. Have the vehicle
checked by your dealer immediately.
Anti-lock brake system:If the
ABS light stays illuminated or
continues to flash, a malfunction has
been detected, have the system
serviced immediately. Normal
braking is still functional unless the brake warning light also is
illuminated.
Air bag readiness:If this light fails
to illuminate when ignition is turned
to ON, continues to flash or remains
on, have the system serviced
immediately. A chime will also sound when a malfunction in the
supplemental restraint system has been detected.
Safety belt:Reminds you to fasten
your safety belt. A chime will also
sound to remind you to fasten your
safety belt, refer to theSeating and
Safety Restraintschapter.
Charging system:Illuminates when
the battery is not charging properly.
Engine oil pressure (if
equipped):Illuminates when the oil
pressure falls below the normal
range. Check the oil level and add
oil if needed. Refer toEngine oilin theMaintenance and
Specificationschapter.
Engine coolant temperature:
Illuminates when the engine coolant
temperature is high. Stop the
vehicle as soon as possible, switch off the engine and let cool. Refer to
Engine coolantin theMaintenance and Specificationschapter.
ABS
AIR
BAG
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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Page 13 of 256

Never remove the coolant reservoir cap while the engine is
running or hot.
Traction controlAdvanceTrac
active (if equipped):Illuminates
when the Traction controlsystem
is active. It will be lit for a minimum
of four seconds or for the duration
of the Traction Controlevent,
refer to theDrivingchapter for more information.
Air suspension (if equipped):
•Standard instrument cluster
•Optional instrument cluster
Illuminates when the air suspension
is turned OFF, the load limit is
exceeded or the air suspension
system requires servicing.
Low fuel (if equipped):
Illuminates when the fuel level in
the fuel tank is at or near empty
(refer toFuel gaugein this chapter
for more information).
O/D off:
•Standard instrument cluster
•Optional instrument cluster
Illuminates when the overdrive
function of the transmission has
been turned OFF using the
AIR
SUSP
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
LOW
FUEL
O/D
OFF
CHECK
TRUNK AJAR LTR/100 kmAIR SUSPENSION
OVERDRIVE OFFDOOR
AJAR
LOW
WASHER
FLUID
km
MILES
/GAL
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
13
Page 16 of 256
Optional instrument cluster gauges
Speedometer:Indicates the current vehicle speed.
•Standard instrument cluster
•Optional instrument cluster
Engine coolant temperature gauge:
•Standard instrument cluster
MPH km/h10 203040506070
80
90
10 0
11 0
12 0
20 406080100
120
140
160
180
200
0000000
0 0 0 0
km/h
MPH
km S
TEMPH
C
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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Page 17 of 256
•Optional instrument cluster
Indicates engine coolant
temperature. At normal operating
temperature, the needle will be in
the normal range (between “H” and
“C”). If it enters the red section, the
engine is overheating. Stop the
vehicle as soon as safely possible,
switch off the engine and let the
engine cool, refer toWhat you
should know about fail-safe
coolingin theMaintenance and specificationschapter.
Never remove the coolant reservoir cap while the engine is
running or hot.
Odometer:Registers the total miles (kilometers) of the vehicle.
•Standard instrument cluster
•Optional instrument cluster
Refer toElectronic Message Center
in theDriver Controlschapter on
how to switch the display from
Metric to English.
N
O
R
M
H
C
MPH km/h10 203040506070
80
90
10 0
11 0
12 0
20 406080100
120
140
160
180
200
0000000
0 0 0 0
km/h
MPH
km S
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
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Page 213 of 256

5. Power steering fluid reservoir
6. Engine coolant reservoir
7. Battery
8. Power distribution box
9. Engine oil filler cap
10. Automatic transmission fluid dipstick
WINDSHIELD WASHER FLUID
Add fluid to fill the reservoir if the
level is low. In very cold weather, do
not fill the reservoir completely.
Only use a washer fluid that meets
Ford specification WSB-M8B16–A2.
Refer toLubricant specifications
in this chapter.
State or local regulations on volatile organic compounds may restrict the
use of methanol, a common windshield washer antifreeze additive.
Washer fluids containing non-methanol antifreeze agents should be used
only if they provide cold weather protection without damaging the
vehicle’s paint finish, wiper blades or washer system.
If you operate your vehicle in temperatures below 40° F (4.5°C),
use washer fluid with antifreeze protection. Failure to use
washer fluid with antifreeze protection in cold weather could result in
impaired windshield vision and increase the risk of injury or accident.
Note:Do not put washer fluid in the engine coolant reservoir. Washer
fluid placed in the cooling system may harm engine and cooling system
components.
ENGINE OIL
Checking the engine oil
Refer to thescheduled maintenance informationfor the appropriate
intervals for checking the engine oil.
1. Make sure the vehicle is on level ground.
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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Page 219 of 256

•Always dispose of automotive
batteries in a responsible manner.
Follow your local authorized
standards for disposal. Call your
local authorized recycling center
to find out more about recycling
automotive batteries.
ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should be checked at the
mileage intervals listed inscheduled maintenance information.The
coolant concentration should be maintained at 50/50 coolant and distilled
water, which equates to a freeze point of -34°F (-36°C). Coolant
concentration testing is possible with a hydrometer or antifreeze tester
(such as the Rotunda Battery and Antifreeze Tester, 014–R1060). The
level of coolant should be maintained at the “FULL COLD” level or
within the “COLD FILL RANGE” in the coolant reservoir. If the level falls
below, add coolant per the instructions in theAdding engine coolant
section.
Your vehicle was factory-filled with a 50/50 engine coolant and water
concentration. If the concentration of coolant falls below 40% or above
60%, the engine parts could become damaged or not work properly.A
50–50 mixture of coolant and water provides the following:
•Freeze protection down to -34°F (-36°C).
•Boiling protection up to 265°F (129°C).
•Protection against rust and other forms of corrosion.
•Enables calibrated gauges to work properly.
L
E
A
D
RETURN
RECYCLE
2005 Grand Marquis(grn)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
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