What changes
Unit 09, object 0A58: byte 3, bit 5 = 1. While the parking brake is applied the daytime running lights stay off — for example when parked with the engine running.
Details
Setting of the newer MQB body control module. The lights come back on when the parking brake is released. On the older module the same option is object 0D02, byte 0, bit 5, so a3c refuses there before writing. Unit 09 on MQB Evo is SFD-protected — a token for unit 09 is needed. Roll back by writing the object backup from history.