Ford 2015 FLEX Owner's Manual page 69

68 Keys and Remote Control
Remote Starting the Vehicle
Note: You must press each button within three seconds of each other.
Your vehicle will not remote start and the horn will not sound if you do
not follow this sequence.
To remote start your vehicle:
1. Press the lock button to lock all the doors.
2. Press the remote start button twice. The exterior lamps will flash
twice.
The horn will sound if the system fails to start.
Note: If you remote start your vehicle with an integrated keyhead
transmitter, you must switch the ignition on before driving your vehicle.
If you remote start your vehicle with an intelligent access transmitter,
you must have a programmed intelligent access key inside your vehicle
and press the START/STOP button on the instrument panel once while
applying the brake pedal before driving your vehicle.
The power windows will not work during the remote start and the radio
will not turn on automatically.
The parking lamps will remain on and your vehicle will run for 5, 10, or
15 minutes, depending on the setting. See the Information Displays
chapter to select the duration of the remote start system.
2015 Flex (471)
Owners Guide gf, 1st Printing, October 2014
USA (fus)
The label on your transmitter
details the starting procedure.