Dasilvarsa,
In all my testing with gps and firmwares always tried to observe how and what enabled the Street View in models mentioned in post 1. Maybe even that I had not noticed the use of "Speed ​​Audible Alerts" if it were not for the collaboration of you. The fact is that in my remarks has always appeared the two features together and gps seem to have no difference in hardware or software in relation to Europeans, changing only the local configurations.
I can safely say that the features can be enabled in nuvis 2012 mentioned in post 1, ie, 3400, 3500, 2405 and 2505 and probably others that use the same family firmware.
The Street View feature also works with nuvis 2010/11 of 3700 and possibly others with the same family firmware (2400, 2500), but the feature "Speed ​​Audible Alerts" does not appear in these models, at least I could not locate it (tested in two 3790). In relation to the series 2013 (25x7, 35x7 ..) I do not have any information yet ..