I don't know the answer yet, And before you get hit with a bunch of old DRl Links what ones have you looked at?
Don't use the standard search on here you need to use the Google one. The standard search does not do 3 letter combinations like DRL
I assume the button combo you are talking about is the description in this thread from Evolution
Current info regarding FOG LIGHTS retrofit but I beleive it has to be activated from the dealer first in the computer.
Are you an 08 or 09?