Command not working after removing the main baterry





Local Mercedes Benz dealer offered a new one to me for 3600 EUR!
I am thinking to replace it by one of those replacement radio / navigation systems which can be bought on AliExpress, don`t know which one is good.
For me they all look the same, but the price vary between 200-700 EUR.
Do you have a clue which one is the best?




https://mbworld.org/forums/e-class-w...-pics-txt.html
.Good seller:
http://comand-world.de/html/produkte.html


