Lincoln 1999 Continental - Manual (Page 128)

N (Neutral)
With the gearshift in the N
(Neutral) position, the vehicle can
be started and is free to roll. Hold
the brake pedal down while in this
position.
D (Overdrive)
The overdrive position is the normal
driving position for an automatic
overdrive transaxle. It works the
same way as 3 (Third) but shifts to
a fourth gear — an overdrive gear
— when your vehicle cruises at a
constant speed for any length of
time. This fourth gear will increase
your fuel economy when you travel
at cruising speeds.
Overdrive may not be appropriate for certain terrains. If the transaxle
shifts back and forth between third and fourth gears while you are
driving hilly roads or if your vehicle requires additional power for
climbing hills, shift into 3 (Third).
Driving
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