CD/SD problem ???

New member here, just picked up a GLC 300 coupe, model year is 2018, loving the car so far but can't figure out if this is a problem or if it's just how it is. When listening to a CD or music on a SD card, lets say I'm half way through the CD, when I turn off the car and come back a little later and start the car, the CD starts at the beginning again, every other car I've had always continued the CD where it was when I turned off the car, it does the same with the SD card. I've tried resetting the system via the eject button, read all the manuals to see it there's a setting that I've missed, yesterday I dropped in to the dealer and they said that's how it is. Can anyone here confirm that their car is the same ??