What changes
Unit 09 (body control module (BCM)): long coding, byte 6, bit 5 = 1.
Details
Audi A4 B8 (8K). Needs factory front fog lights and Coming/Leaving Home switched on. The map is compiled from public descriptions of the B8 coding and has not been confirmed by a write on a car. Odyx reads the unit's coding first and shows the changes. On early B8 cars the unit answers over TP2.0 (KWP2000) — you need an ELM327 adapter that supports TP2.0; on the B8.5 some units answer over UDS. To undo, use the write history.
Other options
This is one option of the “Coming home light with the fog lights” setting: only one can be active.