I got a 4F0 910 283 F from ebay for £30, it supports 4 sensors + graphical support (sonar line display) ...
I saw on a forum that it may also support rear view camera support but I did not retro fit that ...
4F0 910 283 F also superseded to 4F0 910 283 N so I would assume that supports everything F does ...
My car originally had a 4F0 910 283 - 4 sensors, no graphical support (sonar line display) ...
From what I saw on a Russian forum :-
4F0 910 283 A - 4 sensors, no graphical support
4F0 910 283 B - 4 sensors, graphical support
4F0 910 283 D - 4 sensors, graphical support
4F0 910 283 F - 4 sensors, graphical support, rear view camera support
I also saw a post were someone said that on parking aid modules which support 8 sensors and you only have 4 connected you can fool the module to work by using resistors in the non connected plug ...
4F0 910 283 C - 8 sensors, graphical support
4F0 910 283 E - 8 sensors, graphical support, rear view camera support
4F0 910 283 G - 8 sensors, graphical support, rear view camera support
4F0 910 283 H - 8 sensors, graphical support, rear view camera support