Help needed With S8 heating

[A8 Ian]

So yesterday I got in the car to go to work and there was no heat what so ever from the blowers?

Stone cold, even after the engine fully warmed up, and coolant tank is full. I have done a full vcds scan with only 1 fault on HVAC
"Function limitations due to missing messages"

I am told the S8 has 4 radiators and a series of valves that open and close allowing the coolant to flow to various places as and when required. Also there 3 or 4 additional electric coolant pumps and after run pumps etc..

I have no diagrams and nothing to go by ... day two in a cold misty S8 is not so fun... any help would be appreciated


2014 S8 factory standard

KR
Ian