Lincoln 2009 MKS Owner's Manual page 176

Seating and Safety Restraints
Your vehicle has LATCH lower anchors for child seat installation at the
seating positions marked with the child seat symbol.
The LATCH anchors are located at
the rear section of the rear seat
between the cushion and seatback,
below the locator symbols on the
seat back. Follow the child seat
manufacturer's instructions to
properly install a child seat with
LATCH attachments.
Follow the instructions on attaching child safety seats with tether straps.
Refer to Attaching child safety seats with tether straps later in this
chapter.
Attach LATCH lower attachments of the child seat only to the anchors
shown.
All the LATCH lower anchors are equally spaced, 280 mm (11 inches)
apart, so that a single LATCH child seat can be installed at any rear
seating position. If two child safety seats are installed using the
LATCH lower anchors, they must be placed in the outboard
seating positions only. If three child safety seats are installed,
you can install two using the LATCH lower anchors by placing
them in each outboard seating position and the third in the
center using the lap/shoulder belt, OR you can use the LATCH
lower anchors for the center child safety seat and the
lap/shoulder belts for the other two child safety seats in the
outboard positions. Use the tether anchors if applicable.
176