heres a little thing i came across that someone might find useful.i fitted the aux input to my z a while back but i really didn't like wires all over from my mp3 player.i happened to come across a sony ericsson bluetooth stereo headset,the model is a hbh-ds200.if you replace the headphones with a small lead to the aux input you will then be able to use any bluetooth mp3 player or mobile phone.i can now close the ashtray cover and still use my mp3 player.no leads
.i will put some pics on at a later date.hope that helps
.....this is the bluetooth headset tucked away in ashtray.
....my mp3 connected and no wires.
.....this is what i used to complete the fitment,excuse crappy cable but it was a quick fix to test thesystem 
.....this is the bluetooth headset tucked away in ashtray.
....my mp3 connected and no wires.
.....this is what i used to complete the fitment,excuse crappy cable but it was a quick fix to test thesystem