Erring very frustrated with my attempts to save a couple of new CDS to the car. I have a 2016 C Class with Comand. I remember popping brand new CDs into the player on my way back from the shops and adding them to the registry on the way home. Tried today and the add to registry option is greyed out. Checked remaining space on registry and it's 3GB so space is not the problem. Has anyone any ideas how I may add my new CDs to the car? Thanks Farmerboy.