Hi there.
I want to share the last sketch that I use to adapt NAC to Citroen C5, the file comes from a well-known French website to which I have adapted some of the functions to better adapt to Citroen C-5. There are still things to improve such as the adaptation of the clock or combined box (Cluster) as current C5 aircross models and PUP UP notifications. Progress is slow but we are moving forward.
It is important for the correct operation of Nac at C-5 with this sketch to use calibration at NAC of 208.