Each model / type Audi has it’s own CanID’s / messages (mostly luckily with minimal differences).
Rns-e is always same hardware and therefor always uses the same ID’s / is always working with my plugin 🙂
I’m afraid your A6 C5 (if I remembered right) does not send the Speed / Rpm / Coolant message at all.
It might use different ID’s, we need to have a look at your log to find out.
Headlights is an interesting one. Do the Rns-e backlights switch on when you switch on your headlights?
This ID must be the same if Rns is responding to it.
Kind regards from Holland,