iPhone 4S - Bluetooth to radio, enable audio, disable phone

[roho]

hi all, i got the phone to pair with my car stereo. audio sounds great!

i only want it to send audio/music to my radio and not connect for phone calls (have separate earpiece for that)

the only way now is to manually go through the stereo menu and disable phone audio each time.

my old htc had options to connect to both audio/phone or audio only, but it seem that the iphone 4 does not?

thanks for your help!