Ram Trucks MEDIA CENTER 430 for Chrysler - Manual (Page 77)

The playback starts automatically after the DVD video is
recognized by the disc drive.
2. Press the MENU hard-key on the right side of the
radio.
If there is no external DVD player installed in the vehicle,
make sure the rear VES video screen is down so it will
turn on automatically and begin playing the video. If the
VES screen is already on, the video mode automatically
changes to play the DVD Video. If there is an external
DVD player installed in the vehicle, you will need to
change the VES screen mode manually.
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