I can only provide information based on the E70. It is a HD based systems so there is no DVD's to load. You can update the maps via DVD or USB stick but there is no "auto update" using a dynamic service.

Traffic incidents are compiled and transmitted in metropolitan areas by a leading FM broadcaster. The data is received through a dedicated tuner, which operates independently of your entertainment source. The reported traffic incidents are displayed as icons on the navigation map and in a list, sorted by distance from your BMW's current position. If you are in areas which do not have this service(out in the country, there are not updates.

In my 2013(x5) and 2011(M3) you have the option of turning on/off the traffic information. This data is overlaid on your nav map. You will see icons for accident, road construction and gray arrows showing where the road congestion is.

Here is a link which should provide any information which I have not provided.

RTTI - Overview - BMW North America

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2012 X5 50i ZAP(2VA, 336, 465), ZTP, ZPP, ZPS(6VC), ZCW, ZRC, 322, 4UB, 4NC, 610
2011 ///M3 Silverstone II
2011 X5 50i(lemon)
-- SOLD --
08 550 Msport
07 X5 4.8I sport
04 545i sport
02 4.4i sport
01 540I M/sport
00 SL500
97 SL500