RTX 17,
According to the manual ( pages 38-40 ) you can do it from the rear seat controls also. The way I understand it, you have to press 3 & 5 together first to activate the headphones and then 2 & 4 to enter dual play.
REAR SEAT RADIO CONTROLS (IF EQUIPPED)
This feature allows front and middle seat passengers to listen to different
media sources (radio, cassette, CD or DVD) simultaneously. (However,
the front and middle-seat passengers cannot listen to two different radio
stations at the same time.)
When the rear seat controls are activated, rear seat passengers can use
the controls to change the playing media for all passengers (Single Play
mode). In this mode, all speakers will play audio from the same media
source for all passengers to hear.
To activate the rear seat radio controls:
• Press the memory preset controls
3 and 5 at the same time. A
headphone icon will illuminate
in the radio display, indicating the rear seat radio controls are active.
• Press memory preset controls 3 and 5 a second time to deactivate the
rear seat controls. The headphone icon will turn off in the radio
display.
If there is a discrepancy between the rear seat controls and the front
audio controls (such as both trying to listen to the same playing media),
the front audio system will receive the desired selection.
To activate Dual Play mode (rear
seat passengers listen to a different
playing media than the front seat
passengers):
• Press the speaker/headphone
control.
• Press the MODE control to
change audio sources (for
headphone mode only)
• Use the SEEK, VOLUME and
MEMORY/MEM controls to make adjustments to the playing media.
• Dual Play mode may also be
activated by pressing memory
presets 2 and 4 simultaneously on
the front audio controls.
The rear speakers mute and rear seat passengers have audio (for their
selected media) available through their headphones.
Using headphones/Dual Play mode
Plug a 3.5 mm headphone (not included) into the jack. Press the
speaker on/off control to operate the headphones. DUAL PLAY
illuminates in the radio display and the fade control is disabled, signaling
that Dual Play has been activated.
The rear speakers will cut out once the speaker on/off control is pressed.
The front speaker will remain playing for the front passengers. Press the
control again to deactivate the headphones. SINGLE PLAY illuminates in
the radio display and the fade control is enabled, signaling that Dual Play
mode has been deactivated.
To enable Dual Play, the rear seat controls must be active
and illuminated in the radio display.
Mode select
Push the MODE control to toggle
between AM, FM1, FM2, tape (if
equipped), CD, CD changer (if
equipped) or DVD (if equipped). If
in Dual Play mode, SHARED
illuminates in the radio display when
the front and rear modes are set to
the same media.
HTH
Matt