I do not know if this is possible in the case of this radio but I will ask if you allow
The model is VWZ1Z2 Radio Navigation System, FIS & SPI memory type 25C160.
Below is a dump in which I hope is the code: Deposit Files Free File Hosting, Online Storage & File Upload with FileServe Download memory.zip for free on uploading.com
Please help in reading this code. Thank you in advance for your help.