Since yesterday he is here… R350 4-matic lang, BJ 2009, Facelift… Question about Command etc.

Hola, yesterday I have my Bombi. Finally the kids have a place 😉 Now a 😉 Question: How can I find out a) which command I have (version etc.) b) how I can plug in AUX c) whether a hard drive is installed, if no, how can I do it without having to screw up the entire cockpit d) on the level my Navi is What else do I need to know?!? Oh yes, can the command access my Android phone addresses or do you really have to import the contacts? Noc h one: According to my information, there are no trunk trays anymore, are they no longer manufactured? Does someone know the cargo compartment lining with shock guard to fold out, what are they? So now the last, unfortunately I have no rear blinds, you can retrofit something like that, or better from the accessories, which you just clamp on the windows and then pull down. Despite disc tinting is a long ride for the little ones so unpleasant… Otherwise I am on family exit.