What changes
Unit 09 (body control module (BCM)): adaptation channel 25 = 8000 (ms).
Details
Audi A4 B8 (8K). Needs the factory headlight washers. Before writing, Odyx logs in to unit 09 — this channel requires it. 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 “Headlight washer delay” setting: only one can be active.