You cannot control next track/previous track with a BT car stereo or BT headphones because the AVRCP bluetooth profile is not supported.
I just posted this to the feedback page for feature requests for iPhone:
If enough people do the same then they might add the feature sooner!!
I also pasted this on discussions.apple.com but they keep removing it!!
Looks like the only way to get this is to buy a BT adapter that supports AVRCP...

I just posted this to the feedback page for feature requests for iPhone:
Hi Guys,
I love that I can now stream my music to the stereo in my car with the A2DP Bluetooth profile, however I am unable to skip forward or go back a track using the car stereo because AVRCP profile is not currently supported on the iPhone. Put simply this Bluetooth profile allows remote control of a device over Bluetooth.
Link to Wikipedia here: http://tinyurl.com/AVRCP-Bluetooth
I would like to request this be added to a future update and then I can truly leave the iPhone somewhere safe and not have to use it to skip tracks whilst driving.
Thanks,
If enough people do the same then they might add the feature sooner!!
I also pasted this on discussions.apple.com but they keep removing it!!
Looks like the only way to get this is to buy a BT adapter that supports AVRCP...
