There should be a combination of buttons that allow the display of CAN messages (or diagnostics) in the car radio display. Anybody knows?

I am referring to Octavia 5 FSi Ambiente (no nav). Thanks

There used to be a list for displaying diagnostics on the Climatronic display - try doing a search under Diagnostics.

Not sure if it applies to an Octy II though.

This thread details how it works on the "old" Octys. I think the new climate control units look different so I'm not sure this is of any use for Octy II