http://www.nicoclub.com/FSM/EX/2008/AV.pdf
AV-467
The Confirmation and Adjustment menu is found by pressing SETTINGS and turning the radio volume knob (radio off).
As far as EXs equipped with AVM I cannot stress enough to make a note of any settings before adjusting anything. There is a very specific procedure for aligning them and unless the camera is replaced the adjustment should not be necessary.
"I read in a Newspaper Article today, that Sony is the maker of the AVM System."
I had no idea, if you have a link I'd like to see. Details of who makes these systems are always sparse and often the exact opposite of whatever I am told or read. I am known across the internet for bad information.