Jeep Grand Cherokee 2013 Owner's Manual page 401

If the radio functions (FM, AM, or SAT) are in the shared
mode with the VES™, only the radio is able to control the
radio functions. In this case, VES™ can share the radio
mode, but not change stations until the radio mode is
changed to a mode that is different from the VES™
selected radio mode. When shared, the radio has priority
over the VES™ or all radio modes (FM, AM, and SAT).
The VES™ has the ability to switch tuner (AM/FM),
SEEK, SCAN, TUNE, and recall presets in radio modes as
long as it is not in shared mode.
UNDERSTANDING YOUR INSTRUMENT PANEL 399
When in shared disc or satellite video mode both the
radio and the VES™ have control of the video functions.
The VES™ has the ability to control the following video
modes:
1. CD: Ability to Fast Forward, Rewind, Scan, and Track
Up/Down.
2. CD Changer (in radio): Ability to Disk Up/Down and
program all listed CD controls (Fast Forward, Rewind,
Scan, and Track Up/Down).
The VES™ can even control radio modes or video modes
while the radio is turned off. The VES™ can access the
radio modes or disc modes by navigating to those modes
on the VES™ and activating a radio mode or disc mode.
4