lipi128

Hey guys im new to the mercedes benz world but you guys sound knowledgable so i figured i could ask you guys a question. I just bought a used 2008 E350 from and auto auction and im pretty sure it doesnt have navigation (says to insert nav-dvd). My major question is that I can barely see anything on the screen, it is way too dark. I changed the setting from daytime to nighttime and it made it worse (pitch black). I also tried to change the brightness all the way up and it did not change anything. I dont know if there is something else i can try or if you guys think theres a problem electronically. Thanks in advance!!