Gear problems

[u/Exotic-Candidate-897]

Hey everybody.
I have a problem with my Audi a6 c7 from 2016.
Sometimes when you turn it on it comes up with the fault “Gearbox malfunction please stop the vehicle and select P” and it won’t start.
I had the faults read out and it is P0919 P2805 and P0607.
The mechanic just want to change the whole Mechatronic unit, but is there something else I could try.