I have a BMW Z3. Anyone put a unit in a Z3? When I take the unit out to add/delete mp3's, can I hook it up to my home unit and listen to the mp3's thru my home stereo unit?

If the Z3 can accept a standard euro DIN radio unit, it should be ok in the dash. You will, of course, need to wire it to a (new or existing) remote amp, though.

Yes the nice empeg people also send you an A/C power supply and the unit has standard RCA jacks to connect to your home audio. You do not need another slideout enclosure for home use.