Jeep 2013 Grand Cherokee - 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. 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.
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UNDERSTANDING YOUR INSTRUMENT PANEL 399