I have a 2016 Cla 220 d. I have transferred most of my music collection onto a memory stick to use in the car. However this is proving a problem as most times that I leave the car I return to the message "no device found". I then have to remove the memory stick from the USB port and plug it back in. At that stage I am back to the same first song and not what I had been listening to earlier. Is this normal or is there anything I can do to rectify this problem?