Hi there!
I have the same car and the same question. I want to set TV in my new Primera and I don't want to put an additional unit into my car. I'm sure that Primera's monitor can show video, because it shows a TV signal from the rear camera!
I have a 1,8 Tekna.
So, please let me know the decision of this question as soon as you know how to solve this problem.
I love my Primera!
My beforehand gratitude,
Vladimir (Ukraine, Kiev, 23).
taran28@bigmir.net