Function to be activated via VCDS - VAG-COM software
Option name: Daytime Running Lights (DLR)
Description of the option: Allows you to keep the intensity of the LEDs when using the turn signals. By default, the intensity of the LED on the side of the indicator used decreases to better distinguish it.
[09 - Central Electricity] -> [Coding - 07] -> [Long Coding Wizard]
Byte 15:
Bit 3: Uncheck "Daytime Running Lights (DRL) inactive with Turn Signal active"