I have a VW Radio which has the possibility to upgrade software via USB. Unfortunately I am not able to find any updates, nor any information regarding the current Software version on the whole internet. So I decided to try to dump the files directly from the unit. My question is how can I perform the dump without physically removing the EEPROM from the board. Is there any possibility to access something through the USB port?
Its market name is RCD 320 on european Market and RCN 210 on Asian market. I do not know what is inside of the unit - as far as I have seen searching the internet, some VW units are using ARM processors and Linux 3.0.5, but this is everything I know so far, as there is no information about these units (neither regarding the SW, nor the HW).
Any guidance would be appreciated as I am a new in this domain, but I have some electronic skills and also programming skills.