Lincoln 2010 MKS Owner's Manual page 228

Driving
2. Accessory — press and release the START/STOP button without
applying the brake pedal. This allows electrical accessories such as the
radio to operate while the engine is not running. ACCESSORY POWER
ACTIVE and PRESS BRAKE TO START will be displayed in the message
center. Refer to Message center in the Instrument Cluster chapter for
more information.
3. On — press and hold the START/STOP button for at least one second
without applying the brake pedal. This will power your vehicle's electrical
system and the warning lights in the instrument cluster will illuminate,
but the engine will remain off. Note: You cannot immediately start your
vehicle from the on mode. If you would like to start the vehicle and you
are in on mode, you must first switch the vehicle off.
4. Start — press the START/STOP button (for any length of time) while
applying the brake pedal. Note: The indicator light on the start button
will illuminate when the vehicle is in on mode and when the engine is
started.
There may be areas inside your vehicle where the IA key is not detected.
If the message NO KEY DETECTED appears on your message center
when you press the START/STOP button, it may be necessary to move
your IA key to another area within the vehicle. The IA key may not be
detected near the roof (between the driver or passenger sunvisor and
the roof, or in the overhead console area) or in the extreme corners of
the rear package tray, near your audio speakers. It is not recommended
that you stow the IA key in these locations. If you move the IA key to a
location where it has been detected before and you still see the NO KEY
DETECTED message, your IA key's battery may be low or you may be in
an area with excessive radio frequency interference. If this occurs, you
can use the backup method to start your vehicle (see below).
Backup Method of Starting: Your
IA key uses a radio frequency signal
to communicate with your vehicle
and authorize your vehicle to start
when you press the START/STOP
button and apply the brake pedal. If
excessive radio frequency
interference is present in the area,
or if the battery in your IA key is
low, it may be necessary to start
your car by inserting the IA key in
the backup slot, located in your glove box. Insert the IA key into the slot
with buttons facing out and with key ring up. After inserting the IA key
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