Hi D,I don't understand the question - you say you know it will require aftermarket control but then ask if the controls will work through the headunit.
What exactly are you looking to do?
Cheers PS, will look into it.i think what you need is alpines vehicle hub pro. im having one installed next week - it integrates with the oem system including menus and steering wheel controls. basically it allows you to then add alpine components (dvd/nav/tv etc) and control them via oem head unit. ive looked at all sorts of set-ups and this seems to be the 'best' solution for our cars.