Page 339 of 405

3. Step back while the pressure releases.
4. When you are sure that all the pressure has been released, use the
cloth to turn it counterclockwise and remove the cap.
5. Fill the coolant reservoir slowly with the proper coolant mixture, to
within the COLD FILL RANGE or the FULL COLD level on the reservoir.
If you removed the radiator cap in an overflow system, fill the radiator
until the coolant is visible and radiator is almost full.
6. Replace the cap. Turn until tightly installed. Cap must be tightly
installed to prevent coolant loss.
After any coolant has been added, check the coolant concentration (refer
toChecking engine coolant). If the concentration is not 50/50, drain
some coolant and adjust the concentration. It may take several drains
and additions to obtain a 50/50 coolant concentration.
Whenever coolant has been added, the coolant level in the coolant
reservoir should be checked the next few times you drive the vehicle. If
necessary, add enough 50/50 concentration of engine coolant and
distilled water to bring the liquid level to the proper level.
If you have to add more than 1.0 quart (1.0 liter) of engine coolant per
month, have your authorized dealer check the engine cooling system.
Your cooling system may have a leak. Operating an engine with a low
level of coolant can result in engine overheating and possible engine
damage.
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.
Coolant refill capacity
To find out how much fluid your vehicle’s cooling system can hold, refer
toMaintenance product specifications and capacitiesin this chapter.
Fill your engine coolant reservoir as outlined previously in theAdding
engine coolantsection.
Maintenance and Specifications
339
2012 Flex(471)
Owners Guide, 1st Printing
USA(fus)
Page 368 of 405
Items CapacityFord Part Name or
equivalentFord Part Number /
Ford Specification
Engine coolant
(3.5L engine)
3
13.2 quarts
(12.5L)MotorcraftSpecialty
Green Engine Coolant
(dark green-colored)•VC-10-A2 (US)
•CVC-10-A (Canada) /
WSS-M97B55-A
MotorcraftSpecialty
Orange Engine Coolant•VC-3-B (US)
•CVC-3-B (Canada) /
WSS-M97B44-D
Engine coolant
(3.5L V6 EcoBoost
engine)
3
13.7 quarts
(13.0L)MotorcraftSpecialty
Green Engine Coolant
(dark green-colored)•VC-10-A2 (US)
•CVC-10-A (Canada) /
WSS-M97B55-A
MotorcraftSpecialty
Orange Engine Coolant•VC-3-B (US)
•CVC-3-B (Canada) /
WSS-M97B44-D
Power steering fluid
(except EcoBoost
engine)Between MAX and
MIN on reservoirMotorcraft
MERCONVATFXT-5-QM /
MERCONV
Fuel tank18.6 gallons
(70.4L)——
Maintenance and Specifications
368
2012 Flex(471)
Owners Guide, 1st Printing
USA(fus)
Page 369 of 405

Items CapacityFord Part Name or
equivalentFord Part Number /
Ford Specification
Windshield washer fluid Fill as requiredMotorcraftPremium
Windshield Washer
Concentrate (US)
Premium Quality
Windshield Washer Fluid
(Canada)ZC-32-A (US)
CXC-37-(A, B, D, and F)
(Canada) /
WSB-M8B16-A2/- -
1Approximate dry fill capacity. Actual amount may vary during fluid changes.2Automatic transmissions that require MERCONLV should only use MERCONLV fluid. Refer to
scheduled maintenance informationto determine the correct service interval. Use of any fluid
other than the recommended fluid may cause transmission damage.3Add the coolant type originally equipped in your vehicle.4Use of synthetic or synthetic blend motor oil is not mandatory. Engine oil need only meet the
requirements of Ford specification WSS-M2C945-A (3.5L V6 engine) or WSS-M2C946-A (3.5L V6
EcoBoost engine) and the API Certification mark.5See your authorized dealer for fluid level checking or filling.
Maintenance and Specifications
369
2012 Flex(471)
Owners Guide, 1st Printing
USA(fus)
Page 401 of 405

coolant .....................................336
fail-safe cooling .......................342
idle speed control ...................334
lubrication specifications .......366
refill capacities ........................366
service points ..................326–327
Engine block heater .................250
Engine oil ..................................330
checking and adding ..............330
dipstick ....................................330
filter, specifications ................365
refill capacities ........................366
specifications ..........................366
Event data recording ....................7
Exhaust fumes ..........................250
F
Fail safe cooling ........................342
Family entertainment system ....46
Fleet MyKey programming ......120
Floor mats .........................112–113
Fluid capacities .........................366
Fog lamps ....................................81
Four-Wheel Drive vehicles
driving off road .......................279
Freezer ........................................96
Fuel ............................................343
calculating fuel
economy ............................20, 349
cap ...........................................345
capacity ...................................366
choosing the right fuel ...........346
detergent in fuel .....................348
filler funnel .............................348
filling your vehicle with
fuel ...........................343, 345, 349
filter, specifications ........343, 365fuel pump shut-off ..................286
improving fuel economy ........349
octane rating ...................347, 370
quality ......................................347
running out of fuel .........302, 348
safety information relating to
automotive fuels .....................343
Fuses ..........................................287
G
Garage door opener ..................108
Gas cap (see Fuel cap) ............345
Gas mileage
(see Fuel economy) .................349
Gauges .........................................16
H
Hazard flashers .........................286
Headlamps ...................................80
aiming ..................................82–83
autolamp system .......................80
bulb specifications ....................86
daytime running lights .............82
flash to pass ..............................81
high beam .................................81
replacing bulbs .........................86
turning on and off ....................80
Heating
heating and air conditioning
system ...........................67, 70, 73
Homelink wireless control
system ........................................108
Hood ..........................................325
I
Ignition ...............................247, 370
Illuminated visor mirror .............92
Index
401
2012 Flex(471)
Owners Guide, 1st Printing
USA(fus)