This unit plays audio files as follows:

CAUTION
Do not use an audio file extension on files other than audio files. In addition, do not change the audio file extension. Otherwise, the unit will not recognize the file correctly resulting in noise or a malfunction.
NOTE
MP3/WMA/AAC/OGG files written under specifications other than the indicated specification may not play normally or files/folder names may not display correctly.
Operating Tips for OGG
Audio SetMazda 6 Owners Manual: Generator removal/installation
Warning
When the battery cables are connected, touching the vehicle body with
generator terminal B will generate sparks. This can cause personal injury, fire,
and damage to the electrical components. Always disconnect the battery negative
cables before performing the following operation.
...
Mazda 6 Owners Manual: Seat Operation
1. Seat Slide
(Manual Seat)
To move a seat forward or backward, raise the lever and slide the seat to the
desired position and release the lever.
Make sure the lever returns to its original position and the seat is locked in
place by attempting to push it forward and backward.
(Power Seat) ...