it has the #D symbol on it. I know I know RTFM but that is outside!

 

Sounds to me like you are talking about the fog lights.

 

i'm assuming the "#D" is referring to the little picture that of what appears to be headlights, with 3 lines pointing downwards and a single squiggly line going through them vertically.

If so, that would be fog lights. The squiggly line represents the fog, the D represents the headlights and the 3 angled lines downward represent the angle of the light (foglights point low compared to regular headlights).

 

And I understand why the question was asked.
You can barely even tell the difference between when the fogs are on and when they are off.

I know some of you think they work well... but these fog lights are an absolute joke.
I can think of a lot of descriptive words, but functional is not one of them.

Okay, I'm off my soapbox now... still love my G!