I would have to say (this is coming from someone who does NOT know BMW's) that the USB to 3.5mm jack will NOT show you song information. The 3.5mm jack is strictly left and right audio channels, and I would assume that the only way to retrieve song information is for the Phone to send the information through the 3.5mm jack and for the cars factory stereo to decode that information and display it on the screen. My understanding is that this is not possible. I will research this though and edit if necessary, now I am interested...

I wonder if that specific cord (USB to 3.5mm jack) is for the iPod Shuffle? The Shuffle uses the jack to charge and to sync with a PC.

EDIT: according to a Google search the USB to 3.5mm jack is to send audio signal to a USB device, it does not specify that it will work with your Device, or if it will even work with stereo equipment. I can only find what it is supposed to do, not what it will do, hope this helps.

 

I will say this, ID3 tags do not show up when I plug my phone into my stereo via USB..... .....BUT that could be the stereo itself and not my phone. It could be that my stereo (being a little over 2 years old going by the MFG date) does not support ID3 tags and only supports AAC tags (from Apple.)

Best guess it to plug your phone into your Cars stereo Via USB, Mount the SD card (if avalible) and start playing a song, just like you would with your thumb drive. If the ID3 tag shows up AWESOME! If not, unmount the SD card (if mounted) and unplug the USB from the stereo, put your tail between your legs and run away screaming, because the Germans finally did something WRONG with an automobile!!! LOL Just Kiddin on that last part BTW