2021 LINCOLN NAUTILUS air filter

Setting the Blower Motor Speed
.............155
Setting the Temperature ............................
155
Directing the Flow of Air ............................
155
Auto Mode .....................................................
156
Climate Control – Troubleshooting .........
157
Interior Air Quality
What Is the Cabin Air Filter ........................
158
Replacing the Cabin Air Filter ...................
158
Front Seats
Front Seat Precautions ...............................
159
Sitting in the Correct Position ...................
159
Power Seats ..................................................
160
Massage Seats ..............................................
163
Heated Seats .................................................
163
Ventilated Seats ...........................................
164
Rear Seats
Manual Seats .................................................
165
Power Seats ...................................................
167
Heated Seats .................................................
167Rear Occupant Alert System
What is the Rear Occupant Alert System
.......................................................................
169
How Does the Rear Occupant Alert System Work ............................................................
169
Rear Occupant Alert System Precautions .......................................................................
169
Rear Occupant Alert System Limitations .......................................................................
169
Switching Rear Occupant Alert System On and Off ........................................................
170
Rear Occupant Alert System Indicators .......................................................................
170
Rear Occupant Alert System Audible Warnings ....................................................
170
Memory Function
How Does the Memory Function Work ........................................................................\
171
Memory Function Precautions ...................
171
Locating the Memory Function Buttons ........................................................................\
171
Saving a Preset Position ..............................
171
Recalling a Preset Position .........................
171Garage Door Opener
What Is the Garage Door Opener
............
173
How Does the Garage Door Opener Work .......................................................................
173
Garage Door Opener Precautions ...........
173
Garage Door Opener Limitations .............
174
Programming the Garage Door Opener to Your Hand-Held Transmitter ..................
174
Programming the Garage Door Opener to Your Garage Door Opener Motor ........
175
Programming the Garage Door Opener to Your Gate Opener Motor .......................
175
Clearing the Garage Door Opener ..........
176
Reprogramming the Garage Door Opener .......................................................................
176
Garage Door Opener Radio Frequencies .......................................................................
176
USB Ports
Locating the USB Ports ...............................
178
Playing Media Using the USB Port ..........
178
Charging a Device .......................................
178
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2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Table of Contents

Recreationally Towing Your Vehicle - 2.0L,
FWD .............................................................314
Recreationally Towing Your Vehicle - 2.7L .......................................................................
314
Emergency Towing ......................................
315
Fuses
Fuse Precautions ..........................................
316
Under Hood Fuse Box ................................
316
Body Control Module Fuse Box ..............
326
Identifying Fuse Types ................................
331
Fuses – Troubleshooting ...........................
331
Maintenance
Maintenance Precautions .........................
332
Opening and Closing the Hood ..............
332
Under Hood Overview - 2.0L ...................
334
Under Hood Overview - 2.7L ...................
336
Engine Oil ......................................................
338
Checking the Coolant ................................
340
Changing the Engine Air Filter .................
344
Changing the Fuel Filter ............................
344
Drive Belt Routing Overview - 2.0L ........
345Drive Belt Routing Overview - 2.7L
.........
345
Changing the 12V Battery .........................
345
Adjusting the Headlamps ..........................
348
Exterior Bulbs ...............................................
350
Interior Bulbs ................................................
353
Vehicle Care
Cleaning Products .......................................
354
Cleaning the Exterior .................................
355
Waxing ............................................................
357
Cleaning the Interior ...................................
357
Repairing Minor Paint Damage ................
359
Body Styling Kits
Body Styling Kit Precautions ....................
360
Storing Your Vehicle
Preparing Your Vehicle for Storage .........
361
Removing Your Vehicle From Storage ......................................................................
362
Wheel and Tire Information
Locating the Tire label ...............................
363Department of Transportation Uniform Tire
Quality Grades .........................................
363
Information on the Tire Sidewall .............
364
Glossary of Tire Terminology ...................
369
Tire Replacement Requirements ............
369
Using Snow Chains .....................................
372
Tire Care
Checking the Tire Pressures ....................
374
Inflating the Tires .........................................
374
Inspecting the Tire for Wear .....................
375
Inspecting the Tire for Damage ...............
375
Inspecting the Wheel Valve Stems .........
376
Tire Rotation .................................................
376
Tire Sealant and Inflator Kit
What Is the Tire Sealant and Inflator Kit ......................................................................
378
Tire Sealant and Inflator Kit Precautions ......................................................................
378
Locating the Tire Sealant and Inflator Kit ......................................................................
378
Tire Sealant and Inflator Kit Components ......................................................................
379
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2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Table of Contents

SYMBOLS USED ON YOUR
VEHICLE
These are some of the symbols you may see
on your vehicle.
Air conditioning system
Air conditioning system lubricant
type
Anti-lock braking system
Avoid smoking, flames or sparks
Battery
Battery acid
Brake fluid - non petroleum based Brake system
Brake system
Cabin air filter
Check fuel cap
Child safety door lock or unlock
Child seat lower anchor
Child seat tether anchor
Cruise control
Do not open when hot Electric Parking brake
Engine air filter
Engine coolant
Engine coolant temperature
Engine oil
Explosive gas
Fan warning
Fasten seatbelt
Flammable
Front airbag
19
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Symbols GlossaryE162384 E231157 E270480 E332905 E71880 E231160 E67017

See Instrument Cluster Overview (page 137).
A
See
Feature Bar (page 433).
B
See
Replacing the Cabin Air Filter (page 158).
C
See
Shifting Your Vehicle Into Gear (page 207).
D
See
Applying the Electric Parking Brake (page 221).
E
See
Exterior Lighting Control (page 119).
F
30
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Visual Search

WHAT IS THE CABIN AIR FILTER
The cabin air filter improves the quality of air
in your vehicle by trapping dust, pollen and
other particles.
REPLACING THE CABIN AIR FILTER
Replace the filter at regular intervals. See
Scheduled Maintenance (page 459).
The cabin air filter is behind the glove
compartment.
To remove the lower glove compartment and
access the filter:
1. Open the glove compartment. 2. Press the tab on each side.
3. Fully lower the glove compartment.
4. Pull the glove compartment toward you.
158
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Interior Air QualityE311296

WHAT IS THE CATALYTIC
CONVERTER
The catalytic converter is part of your
vehicle's emissions system and filters harmful
pollutants from the exhaust gas.
CATALYTIC CONVERTER
PRECAUTIONS
WARNING: Do not park, idle or drive
your vehicle on dry grass or other dry
ground cover. The emission system heats
up the engine compartment and exhaust
system, creating the risk of fire. WARNING:
The normal operating
temperature of the exhaust system is very
high. Never work around or attempt to
repair any part of the exhaust system until
it has cooled. Use special care when
working around the catalytic converter.
The catalytic converter heats up to a very
high temperature after only a short period
of engine operation and stays hot after the
engine is switched off.
To avoid damaging the catalytic converter:
• Do not crank the engine for more than
10 seconds at a time.
• Do not run the engine with a spark plug
lead disconnected.
• Do not push-start or tow-start your
vehicle. Use booster cables.
See Jump
Starting Precautions (page 309).
• Use the correct fuel.
See Fuel and
Refueling (page 197).
• Do not switch the ignition off when your
vehicle is moving. •
Avoid running out of fuel.
• Have the items listed in scheduled
maintenance information performed
according to the specified schedule.
Note: Do not make any unauthorized
changes to your vehicle or engine. By law,
vehicle owners and anyone who
manufactures, repairs, or services a fleet of
vehicles are not permitted to intentionally
remove an emission control device or
prevent it from working.
CATALYTIC CONVERTER –
TROUBLESHOOTING
Catalytic Converter – Warning Lamps
Your vehicle has an on-board diagnostics
system that monitors the emission control
system. If any of the following warning lamps
illuminate, this may indicate that the on-board
diagnostics system has detected an emission
control system malfunction.
204
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Catalytic Converter

REDUCED ENGINE PERFORMANCE
WARNING: If you continue to drive
your vehicle when the engine is
overheating, the engine could stop without
warning. Failure to follow this instruction
could result in the loss of control of your
vehicle.
If the engine coolant temperature gauge
needle moves to the upper limit position, the
engine is overheating.
See What Is the
Engine Coolant Temperature Gauge (page
139).
You must only drive your vehicle for a short
distance if the engine overheats. The
distance you can travel depends on ambient
temperature, vehicle load and terrain. The
engine continues to operate with limited
power for a short period of time.
If the engine temperature continues to rise,
the fuel supply to the engine reduces. The
air conditioning switches off and the engine
cooling fan operates continually. 1. Gradually reduce your speed and stop
your vehicle as soon as it is safe to do
so.
2. Immediately switch the engine off to prevent severe engine damage.
3. Wait for the engine to cool down.
4. Check the coolant level.
See Checking
the Coolant (page 340).
5. Have your vehicle checked as soon as possible.
COLD WEATHER PRECAUTIONS
The functional operation of some
components and systems can be affected at
temperatures below approximately
-13°F
(-25°C).
BREAKING-IN
You need to break in new tires for
approximately
300 mi (480 km). During this
time, your vehicle may exhibit some unusual
driving characteristics. DRIVING THROUGH WATER WARNING:
Do not drive through
flowing or deep water as you may lose
control of your vehicle.
Note: Driving through standing water can
cause vehicle damage.
Note: Engine damage can occur if water
enters the air filter.
Before driving through standing water, check
the depth. Never drive through water that is
higher than the bottom of the front rocker
area of your vehicle.
305
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Driving Hints

Engine coolant reservoir. See Checking the Coolant (page 340).
A
Engine oil dipstick.
See Engine Oil Dipstick Overview (page 338).
B
Engine oil filler cap.
See Adding Engine Oil (page 338).
C
Brake fluid reservoir.
See Checking the Brake Fluid (page 218).
D
Battery.
See Changing the 12V Battery (page 345).
E
Power distribution box.
See Accessing the Under Hood Fuse Box (page 316).
F
Air filter.
See Changing the Engine Air Filter (page 344).
G
Windshield washer fluid reservoir.
See Adding Washer Fluid (page 118).
H
335
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance