It's fairly easy to remove your headunit and I believe the wiring is easy.
gotta love youtube:
http://www.youtube.com/watch?v=T3xwamWsVKM

line #3 under key features:
"With special wire harness, you do not need to cut any wire of your car. it's easy to install"

I installed a similar one for a Nissan X-trail and it was basically plug and play.
you could always ask the seller about the wiring harness.