
To restore the full functionality of the tire pressure monitoring system,
have the damaged road wheel/tire repaired and remounted on your
vehicle. For additional information, refer toChanging tires with a
TPMSin this section.
When you believe your system is not operating properly
The main function of the tire pressure monitoring system is to warn you
when your tires need air. It can also warn you in the event the system is no
longer capable of functioning as intended. Please refer to the following
chart for information concerning your tire pressure monitoring system:
Low tire
pressure
warning lightPossible cause Customer action required
Solid warning
lightTire(s)
under-inflated1. Make sure tires are at the proper
pressure. SeeInflating your tires
in this chapter.
2. After inflating your tires to the
manufacturer’s recommended
pressure as shown on the Tire
Label (located on the edge of
driver’s door or the B-Pillar), the
vehicle must be driven for at least
two minutes over 20 mph
(32 km/h) before the light turns
off.
Spare tire in use Repair the damaged road wheel/tire
and reinstall it on the vehicle to
restore system functionality. For a
description on how the system
functions, refer toWhen your
temporary spare tire is installed
in this section.
TPMS
malfunctionIf the tires are properly inflated
and the spare tire is not in use but
the light remains on, contact your
authorized dealer as soon as
possible.
Wheels and Tires307
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

Low tire
pressure
warning lightPossible cause Customer action required
Flashing
warning lightSpare tire in use Repair the damaged road wheel/tire
and reinstall it on the vehicle to
restore system functionality. For a
description on how the system
functions, refer toWhen your
temporary spare tire is installed
in this section.
TPMS
malfunctionIf the tires are properly inflated
and the spare tire is not in use but
the light remains on, contact your
authorized dealer as soon as
possible.
When inflating your tires
When putting air into your tires (such as at a gas station or in your
garage), the tire pressure monitoring system may not respond
immediately to the air added to your tires.
It may take up to two minutes of driving over 20 mph (32 km/h) for the
light to turn off after you have filled your tires to the recommended
inflation pressure.
How temperature affects your tire pressure
The tire pressure monitoring system (TPMS) monitors tire pressure in
each pneumatic tire. While driving in a normal manner, a typical
passenger tire inflation pressure may increase approximately 2 to 4 psi
(14 to 28 kPa) from a cold start situation. If the vehicle is stationary
overnight with the outside temperature significantly lower than the
daytime temperature, the tire pressure may decrease approximately 3 psi
(21 kPa) for a drop of 30°F (17°C) in ambient temperature. This lower
pressure value may be detected by the TPMS as being significantly lower
than the recommended inflation pressure and activate the TPMS warning
light for low tire pressure. If the low tire pressure warning light is on,
visually check each tire to verify that no tire is flat. (If one or more tires
are flat, repair as necessary.) Check air pressure in the road tires. If any
tire is under-inflated, carefully drive the vehicle to the nearest location
where air can be added to the tires. Inflate all the tires to the
recommended inflation pressure.
308Wheels and Tires
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

CHANGING A ROAD WHEEL
WARNING:The use of tire sealants may damage your tire
pressure monitoring system (TPMS) and should not be used.
However, if you must use a sealant, the TPMS sensor and valve stem on
the wheel must be replaced by an authorized Ford dealer.
WARNING:Refer toTire pressure monitoring system (TPMS)
in this chapter for important information. If the tire pressure
monitor sensor becomes damaged, it will no longer function.
Note:The tire pressure monitoring system (TPMS) indicator light will
illuminate when the spare tire is in use. To restore the full functionality
of the monitoring system, all road wheels equipped with tire pressure
monitoring sensors must be mounted on the vehicle.
If you get a flat tire while driving, do not apply the brake heavily.
Instead, gradually decrease your speed. Hold the steering wheel firmly
and slowly move to a safe place on the side of the road.
Have a flat serviced by an authorized dealer in order to prevent damage
to the TPMS sensors, refer toTire pressure monitoring system (TPMS)
earlier in the chapter. Replace the spare tire with a road tire as soon as
possible. During repairing or replacing of the flat tire, have the
authorized dealer inspect the TPMS sensor for damage.
Dissimilar Spare Tire and Wheel Assembly Information
WARNING:Failure to follow these guidelines could result in an
increased risk of loss of vehicle control, injury or death.
If you have a dissimilar spare tire and wheel assembly , then it is
intended for temporary use only. This means that if you need to use it,
you should replace it as soon as possible with a road tire and wheel
assembly that is the same size and type as the road tires and wheels that
were originally provided by Ford. If the dissimilar spare tire or wheel is
damaged, it should be replaced rather than repaired.
A dissimilar spare tire and wheel assembly is defined as a spare tire or
wheel that is different in brand, size or appearance from the road tires
and wheels and can be one of three types:
1.T-type mini-spare:This spare tire begins with the letter “T” for tire
size and may have “Temporary Use Only” molded in the sidewall
Wheels and Tires309
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

•Ground clearance and parking at curbs
•Winter weather driving capability
•Wet weather driving capability
•All-wheel driving capability (if applicable)
•Load leveling adjustment (if applicable)
When driving with the full-size dissimilar spare tire and wheel assembly,
additional caution should be given to:
•Towing a trailer
•Driving vehicles equipped with a camper body
•Driving vehicles with a load on the cargo rack
Drive cautiously when using a full-size dissimilar spare tire and wheel,
and seek service as soon as possible.
Tire Change Procedure
WARNING:When one of the front wheels is off the ground, the
transmission alone will not prevent the vehicle from moving or
slipping off the jack, even if the vehicle is in P (Park) (automatic
transmission) or R (Reverse) (manual transmission).
WARNING:To help prevent the vehicle from moving when you
change a tire, be sure the parking brake is set, then block (in
both directions) the wheel that is diagonally opposite (other side and
end of the vehicle) to the tire being changed.
WARNING:If the vehicle slips off the jack, you or someone else
could be seriously injured.
WARNING:Do not attempt to change a tire on the side of the
vehicle close to moving traffic. Pull far enough off the road to avoid
the danger of being hit when operating the jack or changing the wheel.
WARNING:To lessen the risk of personal injury, do not put any
part of your body under the vehicle while changing a tire. Do not
start the engine when your vehicle is on the jack. The jack is only
meant for changing the tire.
Wheels and Tires311
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

Note:Passengers should not remain in the vehicle when the vehicle is
being jacked.
1. Park on a level surface, set the parking brake and activate the hazard
flashers.
2. Place the gearshift lever in P (Park) and turn the engine off.
3. Lift the trunk cargo cover, and remove
the wing nut that secures the spare tire
by turning it counterclockwise.
4. Lift and remove the spare tire from
the trunk.
5. Remove the second wing nut that
secures the jack retention bracket by
turning it counterclockwise, remove the
jack kit from the vehicle.
6. Remove the jack and the wrench from
the felt bag. Fold down the wrench
socket to use to loosen the lug nuts and
to operate the jack.
Vehicle jacking
1. Block the diagonally opposite
wheel.
2. If your vehicle has wheel covers,
remove them with the lug wrench tip
and loosen each wheel lug nut
one-half turn counterclockwise. Do
not remove them until the wheel is raised off the ground.
3. The vehicle jacking points are shown here, and are depicted on the
yellow warning label on the jack.
312Wheels and Tires
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

TECHNICAL SPECIFICATIONS
Wheel Lug Nut Torque Specifications
Retighten the lug nuts to the specified torque within 100 miles (160 km)
after any wheel disturbance (rotation, flat tire, wheel removal, etc.).
Lug nut socket
size/Bolt sizeWheel lug nut torque*
ft-lb N•m
1 2x 20 100 135
* Torque specifications are for nut and bolt threads free of dirt and
rust. Use only Ford recommended replacement fasteners.
WARNING:When a wheel is installed, always remove any
corrosion, dirt or foreign materials present on the mounting
surfaces of the wheel or the surface of the wheel hub, brake drum or
brake disc that contacts the wheel. Ensure that any fasteners that
attach the rotor to the hub are secured so they do not interfere with
the mounting surfaces of the wheel. Installing wheels without correct
metal-to-metal contact at the wheel mounting surfaces can cause the
wheel nuts to loosen and the wheel to come off while the vehicle is in
motion, resulting in loss of control.
Note:Inspect the wheel pilot hole (1) and
mounting surface prior to installation.
Remove any visible corrosion or loose
particles.
Wheels and Tires315
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

Additives and Chemicals
Ford Motor Company recommended additives and chemicals are listed in
this book and in theWorkshop Manual.Additional chemicals or
additives not approved by Ford and are not recommended as part of
normal maintenance. Please consult yourWarranty Manualfor
complete warranty information.
Oils, Fluids and Flushing
In many cases, fluid discoloration is a normal operating characteristic
and, by itself, does not necessarily indicate a concern or that the fluid
needs to be changed. However, discolored fluids that also show signs of
overheating and/or foreign material contamination should be inspected
immediately by a qualified expert such as the factory-trained technicians
at your dealership. Your vehicle’s oils and fluids should be changed at the
specified intervals or in conjunction with a repair. Flushing is a viable
way to change fluid for many vehicle sub-systems during scheduled
maintenance. It is critical that systems are flushed only with new fluid
that is the same as that required to fill and operate the system, or using
a Ford-approved flushing chemical.
Owner Checks and Services
Certain basic maintenance checks and inspections should be performed
every month or at six months intervals.
Check every month
Engine oil level
Function of all interior and exterior lights
Tires for wear and proper pressure, including spare
Windshield washer fluid level
Check every six months
Battery connections; clean if necessary
Body and door drain holes for obstructions; clean if necessary
Cooling system fluid level and coolant strength
Door weatherstrips for wear; lubricate if necessary
Hinges/latches/outside locks for proper operation; lubricate if necessary
Parking brake for proper operation
Safety belts and seat latches for wear and function
Safety warning lamps (brake, ABS, airbag, safety belt) for operation
Washer spray/wiper operation; clean or replace blades as necessary
332Scheduled Maintenance
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)

Multi-Point Inspection
In order to keep your vehicle running right, it is important to have the
systems on your vehicle checked regularly. This can help identify
potential issues and prevent major problems. Ford Motor Company
recommends the following multi-point inspection be performed at every
scheduled maintenance interval to help make sure your vehicle keeps
running great.
Multi-point inspection – Recommended each visit
Accessory drive belt(s) Half-shaft dust boots (if equipped)
Battery performance Horn operation
Clutch operation (if equipped) Radiator, cooler, heater and A/C hoses
Engine air filter Suspension component for leaks or
damage
Exhaust system Steering and linkage
Exterior lamps and hazard
warning system operationTires for wear and proper pressure,
including spare
Fluid levels*; fill if necessary Windshield for cracks, chips or pits
For oil and fluid leaks Washer spray and wiper operation
*Brake, coolant recovery reservoir, manual and automatic transmission
(with an underhood dipstick), power steering (if equipped) and
window washer
Be sure to ask your dealership service advisor or technician about the
multi-point vehicle inspection. It’s a comprehensive way to perform a
thorough inspection of your vehicle. It’s your checklist that gives you
immediate feedback on the overall condition of your vehicle. You’ll know
what’s been checked, what’s okay, as well as those things that may
require future or immediate attention. The multi-point vehicle inspection
is one more way to keep your vehicle running great!
Scheduled Maintenance333
2013 MKS(mks)
Owners Guide gf, 1st Printing
USA(fus)