JVC Navigation KW-NT3(HDTorHD)
I have been very unhappy with the quality of the maps in the on-board JVC nav system in my 2011 Phaeton. For those with a similar problem I have just learned that NavTeq has released an update (Nov 2012) for this system. A bit pricy at $139, plus tax and shipping, for the update but at least there is hope for better directions and trip planning using the on-board system.
I will post an evaluation of the map quality after I receive the update.