i have panasonic strada with japnese language...had done all the home work to change its language..in the end i emailed panasonic japan in english language,requesting them to answer me in english..they were kind enough to answer me english saying that these navigation systems are for their local market and their language and maps cannot be changed...since then im not wasting time on it..
use FM,you will be able to listen to 2 channels only...
use dvd...
mine doesnt have a blue tooth function otherwise you can listen to songs on blue tooth..
cheapest way..> buy a FM modulator and listen to what ever you want.
dont waste energy and money on buying new panel,unless you cant live without all the SASHKAZ...