I've decided the Sony head unit in mine has to go. It's so out of place. I want my autochanger back and working, but i want mp3. So RNS-E seems the best option. I've had a look around and they seem to be sat nav too. Is this correct. I assume I'll need a different cage unit for the double din and a different climate control unit which sits lower. I have Vagcom, so can do the nessecery there.