compatable

I have a 56 plate E320 with ntg1 comand system, the car came without the map dvd, can I get latest discs or will the comand system need updating to run latest ones? I have no idea on firmware version it has and when I tried maps it didn't work so wondering if I need older version to get it...

im looking for a diag scanner for 38 pin e55 210 that can connect to airbag, esp, engine etc have had a bad experience with a supplied Chinese carsoft that hopefully will get a refund for, so will have some funds available soon. Will try another one or even a star at the right price if it can be...

Ive heard Apine make headunits which are compatable with the CLKs dashboard, do other makes make them? Can you recommend a good site which shows the models?