Bonjour,
J'ai trouvé un truc sur un modèle différent.
tu devrais regarder c'est intéressant :
I also had sound issue after update my MIB1 HIGH unit (Control Module Part Number: 8V0 035 043).
Solution posted by jacko with Service Menu also works in my unit, but my problem was connected with hardware.
I temporarily bypassed the problem by disabling speaker check in 5F - Adaptations and the sound came back.
         Chanel:                                        old value:       new value:
VCDS: Electrical test of loudspeakers-Mode automatic       manual
ODIS:  Set_Loudspeaker_Test_Mode:         automatic       manual
I found info how repair unit here:
https://audi-sport.net/xf/threads/mm.../#post-3461946 
https://audi-sport.net/xf/threads/mm.../#post-3461946
En espérant que la désactivation avec VCDS est possible sur ton modèle.
@+