My standard head unit in an 02 plate zetec wont turn on or off with the cars ignition, i have to turn it on by pressing the button and then it tells me i have one hour. Its only just started doing this before it would turn on and off with the key.

So i was looking at getting a new head unit from reading other peoples posts i have gathered i need the following? (just using halfords links for reference)

Multi stalk adapter to make it work with steering wheel controls
http://www.halfords.com/webapp/wcs/s...goryId_165626#

MultiStalk Adapter for what ever head unit i was to buy
http://www.halfords.com/webapp/wcs/s...Sony&width=800

My main question is do i need to also by a harness adaptor aswell as when i check to see on the halford website it says i need the following

http://www.halfords.com/webapp/wcs/s..._TITLE=Harness Adaptor PC2-08-4&width=600

but will the multi stalk adaptor do this for me?

Thank you for any help and sorry if i have missed an obvious post if you want to just point me in the right direction to that im happy to read.