Spong - again, thanks. With each response from you I learn a little more about the jap'isms of the car. As Win4ever correctly pointed out, my car is a 2004.12 Series II (which was sold to me as a 2005 model because it was first registered in Feb '05 - @$#@$). The ETC system is installed alongside the Sat Nav DVD above the glovebox - I could see it would take a card and now I understand what for. Now if only I can work out why the rear view mirror has an electrical wire attached to it...
Andy65b - I understand. I merely asked for an update because I could only find threads regarding the Series I conversion and reading that the "carwings" version conversion was a whole other ball-game. What was the cost for the Series I conversion DVD - any idea?
Win4ever - TV wont be much good unless you wire in an alternate tuner and (possibly) antennae - refer other threads here from Sensei Chris & Co. Forget the Sat Nav, as it's cheaper just to buy a TomTom! However, you can still get good information from the car stats available to you on the LCD screen, such as fuel economy and distance remaining for tank (that screen also has an option to show a history of its economy as a bar chart), and distance to next service (configurable). It's trial-and-error using the joystick, until we see a conversion. The magic key is the menu button (top row - 3rd or 4th?), using the rightmost bottom key to cancel out of each option.
Also worth downloading the 2005 manual from here, remembering that it's for the left-hand drive G35 - http://psedog.com/cars/fsm/g35/coupe/
All-in-all very happy with the car. Now just hanging out for the conversion DVD...