I'm more interested in knowing why his clock is in pieces on the dash
IIRC, the Parrot unit tells the factory head unit that there's a call coming in, then the headunit switches to the Parrot input. But I don't think it is a stereo input, so you likely wouldn't enjoy "streaming" music from your phone.
Nemo, it wouldn't work in your car anyway - Subaru dropped the phone feature from the head unit after 2006/7 I think and used the pins in the harness for an aux-in. I may be wrong on that.