Lincoln 2011 MKS Owner's Manual page 113

If there are problems with the remote entry system, make sure to take
ALL intelligent access keys with you to the authorized dealer in order
to aid in troubleshooting the problem.
Intelligent access
WARNING: Radio waves from the intelligent access system
transmitters in the vehicle may affect certain implanted medical
devices such as pacemakers or cardiac defibrillators. People having
such implanted medical devices should ask the medical device
manufacturer or their physician whether the intelligent access system
may affect the equipment before coming into close proximity with a
vehicle equipped with intelligent access. Failure to do so may result in
interference with the medical device, which could result in serious
injury.
Your vehicle will allow you to unlock and enter your vehicle without
actively using a key or transmitter.You can use the intelligent access
feature at the driver door or at the trunk. You can activate the intelligent
access feature as long as you have one of your intelligent access keys
within range of the driver door or the trunk.
Activating intelligent access at the driver's door: If your IA key is
within 3 feet (1 meter) of the driver's door, you can activate your
intelligent access system by pressing any button on the keyless entry
keypad. The driver's door will automatically unlock and the door can be
opened.
Note: If two stage unlocking is disabled, all doors will unlock when you
press any button on the keyless entry keypad.
Activating intelligent access at the trunk: If your IA key is within
3 feet (1 meter) of the trunk, you can activate your intelligent access
system by pressing the exterior trunk release button, hidden under the
trim above the license plate. The trunk will release and open.
Refer to the Remote entry system in this section for more details on
how to use the lock, unlock, panic, or trunk buttons on the transmitter.
Your intelligent access system uses a radio frequency (RF) signal to
communicate with your vehicle and authorize your vehicle to unlock
when commanded (either by pressing any keyless entry keypad button,
the trunk button, or a button on the transmitter itself). If excessive RF
interference is present in the area, or if your vehicle battery is low, it
may be necessary to mechanically unlock your door. The mechanical key
blade in your IA key can be used to open the driver's door in this
2011 MKS (mks)
Owners Guide, 1st Printing
USA (fus)
Locks and Security
113