I have an Audi A4 with an RNS-E unit. I was wondering if anyone has used a Raspberry Pi in their car? In particular, if you have used one with an RNS-E then I would like to know how it works! I reckon it would be easy enough to work but I don't have any idea how I would get the buttons on the RNS-E unit to send signals to the RPi. If anyone has any resources they think that would help then I would much appreciate it.