What changes
Unit 5F (infotainment (MMI)): adaptation channel 6 = 0.
Details
Audi A4 B8 (8K). MMI 3G+ only. The channel comes from public descriptions of the B8 adaptations and has not been confirmed by a write on a car. Odyx reads the channel's current value first and shows the change: on other versions of the unit the same channel number can mean something else — check that the current value is the one you expect. You need an ELM327 adapter that supports TP2.0. To undo, use the write history.
Other options
This is one option of the “MMI 3G+ engineering menu” setting: only one can be active.