hello i just purchased a 2004 e-320 i have a nav screen but wheni push the nav button it reads "devices not found" does that mewan i need to buy a disk or the nav is not installed? also there is a buttion for a phone, do i blutooh my phont to integrate how do i do that? please i need help im a BMW lady and this is all very new to me
Optional Information:
2004
Mercedes-Benz E 320 V-6
Already Tried:
NOTHING