What changes
Module 5F (MIB3): object 0B1B, byte 10, bit 6 = 1. Trip data stays visible in the MMI with the ignition off.
Details
The menu_display_board_computer_clamp_15_off item from the MIB3 firmware adaptation table — the same firmware (EV_MUTI) as on the A3 8Y. No write reports on a Q3 F3 yet — check the result. MIB3 only (from model year 2021): the MIB2+ (MH2p, 2019–2020) has no such object, and Odyx refuses before writing. If module 5F is SFD-protected (Q3 F3 from model year 2021), Odyx asks for a token; some Chinese MIB3 units have no SFD — then no token is needed. The MMI restarts after writing. To disable, set the same bit to 0.