DRL dim with turn signal was already with my car. Not sure if that is standard with LP or previous owner performed this mod?
I actually watched a youtube video where the guy enables it to prevent it from dimming when using the turn signal. I believe this is somewhat a safety hazard in that the other oncoming traffic cannot see the blinker that clear enough with the DRL light active. I remember it was kind of funny to me because in the video he said, try it out, if you don't like it, you can just set it back. I'm thinking, you might not own a GTI after turning it on to get a chance turn it back off.
I think they turn off when you use the turn signal in the stock setting. It could a DOT requirement. I remember having to specifically pick the dim setting.
I have no idea what makes the light do the "happy dance" at startup. It doesn't always do it.
I should have made a list of the changes I've made. If I had to go and change them back...I'd have to look it up all over again. It been a while since I've used the OBD11 to make any changes.