Sorry to resurrect this old thread, but it was the only one I found mentioning media types that the factory head unit can play. I my case, I was using a USB drive, and found this info from the user manual helpful:
Music files with .mp3, .wma, .ogg, and .wav file name extensions can be played.
MP3 files that can be played: Bit rate: 8 kbps to 320 kbps.
Sampling frequency: 48 kHz, 44.1 kHz, 32 kHz, 24 kHz, 22.05 kHz, and 16 kHz.
Files with a bit rate above 128 kbps will result in higher quality sound.