Mercury 2000 Grand Marquis Owner's Manual page 44

Controls and features
Treble adjust
The treble adjust control allows you
to increase or decrease the audio
system's treble output.
Speaker balance adjust
Speaker sound distribution can be
adjusted between the right and left
speakers.
Speaker fade adjust
Speaker sound can be adjusted
between the front and rear
speakers.
CD select
To begin CD play (if CD[s] are
loaded), press the CD control.
The first track of the disc will
begin playing. After that, CD play
will begin where it stopped last.
Press the control again to begin
CD changer play (if equipped).
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TREB
BAL
FADE
AM
FM
CD