
Engine coolant reservoir cap
A
Engine oil filler cap
B
Engine air cleaner cover
C
Brake fluid reservoir cap
D
Power distribution box
E
Inverter system controller
F
Inverter system controller coolant reservoir cap
G
Engine oil dipstick
H
Windshield washer fluid reservoir cap
I
253
MKZ (CC9) MaintenanceE146046

ENGINE COOLANT CHECK
Engine Coolant and Inverter System
Controller Coolant
Your vehicle is equipped with two
separate cooling systems. One is for
cooling the engine and one is for cooling
the inverter system controller that is
specific to the hybrid operating system.
The two systems operate similarly, with
the inverter system controller cooling
system generally operating at a lower
temperature and pressure.
Checking the Engine Coolant
When the engine is cold, check the
concentration and level of the engine
coolant at the intervals listed in the
scheduled maintenance information. See
Scheduled Maintenance (page 412).
Note: Make sure that the level is between
the MIN and MAX marks on the engine
coolant reservoir.
Note: Coolant expands when it is hot. The
level may extend beyond the MAX mark.
Note: If the level is at the MIN mark, below
the MIN mark, or empty, add prediluted
coolant immediately. See
Adding Engine
Coolant in this chapter.
The coolant concentration should be
maintained within 48% to 50%, which
equates to a freeze point between -30°F
(-34°C) and -34°F (-37°C). Note:
For best results, coolant
concentration should be tested with a
refractometer such as Rotunda tool
300-ROB75240 available from your
dealer. Ford does not recommend the use
of hydrometers or coolant test strips for
measuring coolant concentrations.
Note: Automotive fluids are not
interchangeable. Do not use engine
coolant or antifreeze or windshield washer
fluid outside of its specified function and
vehicle location.
Checking the Inverter System
Controller Coolant
When the engine is cold, check the
concentration and level of the inverter
system controller coolant at the intervals
listed in the scheduled maintenance
information. See Scheduled Maintenance
(page
412).
Note: Make sure that the level is between
the MIN and MAX marks on the inverter
system controller coolant reservoir.
Note: Coolant expands when it is hot. The
level may extend beyond the MAX mark.
Note: If the level is at the MIN mark, below
the MIN mark, or empty, add prediluted
coolant immediately. See Adding Inverter
System Controller Coolant in this chapter.
The coolant concentration should be
maintained within 48% to 50%, which
equates to a freeze point between -30°F
(-34°C) and -34°F (-37°C).
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MKZ (CC9) Maintenance

Note:
For best results, coolant
concentration should be tested with a
refractometer such as Rotunda tool
300-ROB75240 available from your
dealer. Ford does not recommend the use
of hydrometers or coolant test strips for
measuring coolant concentrations.
Note: Automotive fluids are not
interchangeable. Do not use engine
coolant or antifreeze or windshield washer
fluid outside of its specified function and
vehicle location.
Adding Coolant WARNINGS
Do not add engine coolant when the
engine is hot. Steam and scalding
liquids released from a hot cooling system
can burn you badly. Also, you can be
burned if you spill coolant on hot engine
parts. Do not put engine coolant in the
windshield washer fluid container. If
sprayed on the windshield, engine coolant
could make it difficult to see through the
windshield. To reduce the risk of personal injury,
make sure the engine is cool before
unscrewing the coolant pressure relief cap.
The cooling system is under pressure;
steam and hot liquid can come out
forcefully when the cap is loosened
slightly. Do not add coolant further than the
MAX mark. Note:
Do not use stop leak pellets, cooling
system sealants, or additives as they can
cause damage to the cooling or heating
systems. This damage would not be
covered under your vehicle ’s warranty.
Note: During normal vehicle operation,
the coolant may change color from orange
to pink or light red. As long as the coolant
is clear and uncontaminated, this color
change does not indicate the coolant has
degraded nor does it require the coolant
to be drained, the system to be flushed,
or the coolant to be replaced.
Note: It is very important to use prediluted
coolant meeting the Ford specification in
order to avoid plugging the small coolant
passageways. Use of concentrated
coolant and water may cause coolant
passageway plugging and void the
warranty. See Capacities and
Specifications (page 302).
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MKZ (CC9) Maintenance

•
Do not mix different colors or types of
coolant in your vehicle. Make sure the
correct coolant is used. Mixing of
coolants may harm your cooling
system. The use of an improper
coolant may harm the engine, inverter
system controller, and cooling system
components and may void the
warranty.
• In case of emergency, a large amount
of water without engine coolant may
be added to the engine cooling system
only in order to reach a vehicle service
location. In this instance, the engine
cooling system must be drained,
chemically cleaned with Motorcraft
Premium Cooling System Flush, and
refilled with prediluted engine coolant
as soon as possible. Water alone
(without engine coolant) can cause
engine damage from corrosion,
overheating, or freezing. DO NOT use
this method for the inverter system
controller cooling system. The inverter
system controller cooling system
operates close to ambient
temperature, and is susceptible to
freezing in any subfreezing
environment in the absence of coolant.
• Do not use alcohol, methanol, brine or
any engine coolants mixed with alcohol
or methanol antifreeze (coolant).
Alcohol and other liquids can cause
engine damage from overheating or
freezing.
• Do not add extra inhibitors or additives
to the coolant. These can be harmful
and compromise the corrosion
protection of the engine coolant. Adding Engine Coolant
1.
Unscrew the engine coolant reservoir
cap slowly. Any pressure will escape
as you unscrew the cap.
2. Use a funnel to add prediluted engine
coolant to the engine coolant reservoir.
Make sure that the level is between
the MIN and MAX marks on the engine
coolant reservoir. Use prediluted
engine coolant meeting the Ford
specification. See Capacities and
Specifications (page 302).
3. Close the engine coolant reservoir cap.
Whenever you add coolant, check the
coolant level in the engine coolant
reservoir the next few times you drive the
vehicle. If necessary, add enough
prediluted engine coolant to bring the
engine coolant level to the proper level.
Adding Inverter System Controller
Coolant
1. Open the inverter system controller coolant reservoir cap.
2. Use a funnel to add prediluted coolant
to the inverter system controller
coolant reservoir. Make sure that the
level is between the MIN and MAX
marks on the inverter system controller
coolant reservoir. Use prediluted
coolant meeting the Ford specification.
See
Capacities and Specifications
(page 302).
3. Close the inverter system controller coolant reservoir cap.
257
MKZ (CC9) Maintenance

Whenever you add coolant, check the
coolant level in the inverter system
controller coolant reservoir the next few
times you drive the vehicle. If necessary,
add enough prediluted coolant to bring
the inverter system controller coolant level
to the proper level.
Recycled Engine Coolant
Ford Motor Company does not
recommend the use of recycled engine
coolant since a Ford-approved recycling
process is not yet available.
Used engine coolant should be disposed
of in an appropriate manner. Follow your
community’
s regulations and standards for
recycling and disposing of automotive
fluids.
Severe Climates
If you drive in extremely cold climates:
• It may be necessary to have an
authorized Ford dealer increase the
coolant concentration above 50%.
• A coolant concentration of 60% will
provide improved freeze point
protection. Engine coolant
concentrations above 60% will
decrease the overheat protection
characteristics of the engine coolant
and may cause engine damage. If you drive in extremely hot climates:
•
It may be necessary to have an
authorized Ford dealer decrease the
coolant concentration to 40%.
• A coolant concentration of 40% will
provide improved overheat protection.
Engine coolant concentrations below
40% will decrease the corrosion/freeze
protection characteristics of the engine
coolant and may cause engine
damage.
Vehicles driven year-round in non-extreme
climates should use prediluted coolant
meeting the Ford specification for optimum
cooling system and engine protection.
What You Should Know About Fail-
Safe Cooling
If the engine coolant supply is depleted,
this feature allows the vehicle to be driven
temporarily before incremental component
damage is incurred. The “fail-safe ”
distance depends on ambient
temperatures, vehicle load and terrain.
How Fail-Safe Cooling Works
If the engine begins to overheat, the
engine coolant temperature gauge will
move to the red (hot) area and: The coolant temperature
warning light will illuminate.
The service engine soon
indicator will illuminate.
If the engine reaches a preset
over-temperature condition, the engine
will automatically switch to alternating
cylinder operation. Each disabled cylinder
acts as an air pump and cools the engine.
258
MKZ (CC9) Maintenance

When this occurs the vehicle will still
operate. However:
•
The engine power will be limited.
• The air conditioning system will be
disabled.
Continued operation will increase the
engine temperature and the engine will
completely shut down, causing steering
and braking effort to increase.
Once the engine temperature cools, the
engine can be re-started. Take your
vehicle to an authorized dealer as soon
as possible to minimize engine damage.
When Fail-Safe Mode Is Activated WARNINGS
Fail-safe mode is for use during
emergencies only. Operate the
vehicle in fail-safe mode only as long as
necessary to bring the vehicle to rest in a
safe location and seek immediate repairs.
When in fail-safe mode, the vehicle will
have limited power, will not be able to
maintain high-speed operation, and may
completely shut down without warning,
potentially losing engine power, power
steering assist, and power brake assist,
which may increase the possibility of a
crash resulting in serious injury. Never remove the coolant reservoir
cap while the engine is running or
hot. Note:
Driving the vehicle without repairing
the engine problem increases the chance
of engine damage. Take your vehicle to
an authorized dealer as soon as possible. You have limited engine power when in
the fail-safe mode, so drive the vehicle
with caution. The vehicle will not be able
to maintain high-speed operation and the
engine will run rough. Remember that the
engine is capable of completely shutting
down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely
possible and turn off the engine.
2. Arrange for the vehicle to be taken to an authorized dealer.
3. If this is not possible, wait a short period for the engine to cool.
4. Check the coolant level and replenish
if low.
5. Re-start the engine and take your vehicle to an authorized dealer.
AUTOMATIC TRANSMISSION
FLUID CHECK
Note: Transmission fluid should be
checked by an authorized dealer. If
required, fluid should be added by an
authorized dealer.
The automatic transmission does not have
a transmission fluid dipstick.
Have an authorized dealer check and
change the transmission fluid at the
correct service interval. See Scheduled
Maintenance (page 412). Your
transmission does not consume fluid.
However, the fluid level should be
checked if the transmission is not working
properly, (i.e., if the transmission slips or
shifts slowly) or if you notice some sign of
fluid leakage.
259
MKZ (CC9) Maintenance

Engine
•
The engine oil and filter should be
changed prior to storage, as used
engine oil contain contaminates that
may cause engine damage.
• Start the engine every 15 days. Run at
fast idle until it reaches normal
operating temperature
• With your foot on the brake, shift
through all the gears while the engine
is running.
Fuel system
• Fill the fuel tank with high-quality fuel
until the first automatic shutoff of the
fuel pump nozzle.
Cooling system
• Protect against freezing temperatures.
• When removing your vehicle from
storage, check coolant fluid level.
Confirm there are no cooling system
leaks, and fluid is at the recommended
level.
Battery
• Check and recharge as necessary.
Keep connections clean.
• If storing your vehicle for more than 30
days without recharging the battery, it
may be advisable to disconnect the
battery cables to ensure battery charge
is maintained for quick starting.
Note: If battery cables are disconnected,
it will be necessary to reset memory
features. Brakes
•
Make sure brakes and parking brake
are fully released.
Tires
• Maintain recommended air pressure.
Miscellaneous
• Make sure all linkages, cables, levers
and pins under your vehicle are
covered with grease to prevent rust.
• Move vehicles at least 25 feet (8
meters) every 15 days to lubricate
working parts and prevent corrosion.
Removing Vehicle From Storage
When your vehicle is ready to come out
of storage, do the following:
• Wash your vehicle to remove any dirt
or grease film build-up on window
surfaces.
• Check windshield wipers for any
deterioration.
• Check under the hood for any foreign
material that may have collected
during storage (mice/squirrel nests).
• Check the exhaust for any foreign
material that may have collected
during storage.
• Check tire pressures and set tire
inflation per the Tire Label.
• Check brake pedal operation. Drive
your vehicle 15 feet (4.5 meters) back
and forth to remove rust build-up.
274
MKZ (CC9) Vehicle Care

TECHNICAL SPECIFICATIONS
Ford part number / Ford
specification
Ford part name or
equivalent
Capacity
Item
PM-20/
Motorcraft DOT 4
LV High Perform-ance Brake Fluid
Between MIN and
MAX on reservoir
Brake fluid 1
WSS-M6C65-A2
Motorcraft XL-5 (aerosol) /
CRCSL3151ESB/
Multi-Purpose
Grease (lithium grease)
Not applicable
Hinges, latches,
striker plates and
rotors, seat tracks, fuel filler door
hinge and spring ESB-M1C93-B
XL-1 / None
Motorcraft Penet-
rating and Lock Lubricant
Not applicable
Lock cylinder
XT-10-QLV MERCONLV
Motorcraft
MERCON LV ATF
5.7 qt (5.4L)
Automatic transmis-
sion fluid 2, 3
WSS-M2C947-A
Motorcraft SAE 0W-
20 motor oil or equivalent
4.5 qt (4.3L)
Hybrid engine oil 4,
5, 6, 7
VC-3DIL-B (U.S.);
Motorcraft Orange
Antifreeze/Coolant Prediluted
8.2 qt (7.8L)
Hybrid engine
coolant 8
CVC-3DIL-B (Canada)
/ WSS-M97B44-D2
1 qt (1.0L)
Inverter system
controller coolant 8
ZC-32-A (U.S.);
Motorcraft Premium
Windshield Washer
Concentrate with Bitterant(U.S.);
Fill as required
Windshield washer
fluid CXC-37-(A, B, D, and
F) (Canada)
/ WSB-M8B16-A2
Premium Quality
Windshield Washer Fluid (Canada)
Not applicable
Not applicable
13.5 gal (51.1L)
Hybrid fuel tank
306
MKZ (CC9) Capacities and Specifications