Ram Trucks 2015 ProMaster Commercial - Owner Manual - Manual (Page 170)

If the ROTARY knob is turned, the display shows the
Љ
TRKyyyЉ message, where yyy is the track number.
Turning the knob clockwise will forwards the tracks and
turning it counterclockwise will reverse the tracks. While
this is being performed, the information contained in the
ID3 tag is not processed. As the knob is turned, the
Љ
TRKyyyЉ message changes to the track selected.
When the ROTARY knob is pushed or if its position is not
changed for five seconds, the track is selected, the ID3 tag
is processed and the music will start playing. In this case,
the display will show the ЉTRKyyyЉ message for two
seconds and then return to the default display defined by
the DISP function.
When the radio skips from one folder to another, the
display will show the name of the folder to which you are
moving for a few milliseconds (the rotary movements are
ignored during this period) and a maximum of three
seconds. When you reach the final track in the last folder
and turn the ROTARY knob clockwise, the radio will
advance to the first track in the first folder on the USB
device. When you reach the first track in the first folder
and turn the ROTARY knob counterclockwise, the radio
will advance to the last track in the last folder on the USB
device.
Forward/Reverse Folder
When you push the memory 1 button, the radio will
advance to the first track in the next folder containing
audio files, if you push button 2, the radio will return to
the first track in the previous folder containing audio
files.
168 UNDERSTANDING YOUR INSTRUMENT PANEL