Thanks guys- So I should really hold out for the Titanium X if I am going to have this feature I guess and retrofitting will be more bother than it's worth! I am going to be getting a 2011/12 model so that should keep me right.
Do people actually rate the feature? Maybe just a gimmick that no one uses?
You need to find a H/U specifically designed for your car and model, if you install a generic H/U you might end up losing other features as well, such as trip computer info, steering wheel controls etcI think I have found another issue with my plans! I had hoped to take out the standard issue headunit and replace with a double Din headunit such as these:
However from the attached picture it looks like I would loose the air conditioning controls as they it is controlled through the main screen!