[acardi]

No solution but the reason :/
ista-P realease notes 3.57

Programming of control units via Ethernet fails in ISTA/P offline mode
Fault description:
During vehicle handling with ISTA/P in offline mode, the bootloader programming, programming and encoding fail in control units that are programmed directly via Ethernet (e.g. Head Unit High, Rear Seat Entertainment). As a consequential fault, programming of the KOMBI can also fail. Fault code entries are not set.
Model series affected:
F01 (LCI), F02 (LCI), F06, F07, F10 (LCI), F11 (LCI), F12 (LCI), F13, F15, F16, F18, F25 (LCI), F26, F85, F86, I01, I12, F20, F21, F22, F23, F30, F30 HEV, F31, F32, F33, F34, F35, F36, F80, F82, F83, RR4, RR5, F45, F46, F48, F54, F55, F56