This is the part that fits down both A pillars and across the top of the windscreen, where the roof meets the screen.
Item 6 in the photo attached
It has the drainage tubes in either side and it is these blocked/ripped/aged tubes that are often the cause of leaks from the roof into the car...
Now with speech input for picking addresses, built-in FM transmitter (to send music etc. to your car stereo), bigger screen, TMC, etc.
Also "map share" which allows you to make corrections to maps:
Video demos of some of the new stuff...