I've had colour screen parrots in my car since 2004 and a few years ago I upgraded to the still current version, the 9200, as it did give me more input options via the AUX such as audio from the phone, and even an SD card, that I never used.
My first was V2 and I decided to upgrade to a V3, which I think does do that thing with the controls that I'm sure the V2 didn't do, in that you can't use them when the unit is playing music, something I discovered on the way home, so it must be normal.
I also think V3 maybe sounds worse through the AUX, so I'm looking to abandon it