any electrical problems and command system problems? I

What is your question?

I have noticed GPS screen problem after having a problem with rear speakers and melting burning wire smell in the trunk. The vehicle was under extended warranty and dealer replaced speakers and not sure if anything else. Since then I noticed gps screen changing shades and getting lines through it, then eventually it turned black, white with black edges, screen faintly coming back and changing. Now the warranty is expired not having gps was upsetting, then I realized that cd does not eject either. The dealership claims command system problem. Burning wire smell behind steering wheel, under windshield and smoke appeared once through openings by left fender front door and windshield was not addressed by them. Dealer said command system needs to be replaced for $900 did not address the melting wire smell and smoke that all 4 adults saw happen before driving the car to the dealership and did not repeat in the shop. Feel unsafe in the car.Any suggestions greatly appreciated MBUSA no help.

What makes this problem better or worse?

don't know, wire burning gps command system and rear speaker problem

How long has your 2014 Mercedes-Benz E350 had this problem?

rear speaker replaced a year or so ago command system problem shortly after that wire burning and smoke behind windshield behind steering wheel last wek