Hi, I have a big problem and would like to avoid driving again to the “friendly”.Situation: My vehicle BJ 2009 is equipped with Command APS NTG 2.5 (SD card slot, citrus yellow Navi DVD ́s) Unfortunately, many roads etc. are not current in the current Navi. That’s why I bought the 2017 version. You can no longer install/update these versions (believing after 2011) without the firmware 09/29 which only MB installed. I had this done. I thought. The software status you can query (lay on, *, 6) is currently 09/29 – as desired. Now I wanted to play the new DVD ́s on it, the command says: No navigation (is also no longer displayed in the command/header AUDIO, VIDEO, TEL, SYSTEM etc.) Can you do something without MB (cost) ??