Gear problems

Hello, everybody.
I've been a pain in the ass with the question, but I can't get any further... With my V8 the scenery display from the gearbox shows me the emergency operation( all lamps are burning)...
With this I have been to VW already, the measuring instruments can neither the transmission control unit nor the engine control unit read out. The only thing that's missing is a plus signal or something.
So reset try .. The battery is disconnected for 1 hour and the car moves afterwards, hoping that the control unit will get new values.
Then I borrowed from Alex (thank you by the way) a transmission control unit.. but no improvement.
Now I've disassembled the cockpit in my last craft action to see if there might be a mass error on the display. But nothing...
Is there a giver somewhere? a button that delivers the report for the ad?? if yes ? WO? I can get to the leather. 'Cause I'm getting pissed off now!
Greeting from Dithmarschen
Dirk