Have 2006 Audi A4 Avant Quattro , need to know how the inboard lights on both left and right Xenon headlight are turn on and what are their function ?

 

Found answer on Audizine forum, on OEM Bi-Xenon headlights we have turn signal, next DRL with small bulb (city light) and Bi-Xenon bulb (low and high beam) When headlights are set to auto DRL will not come but city lights will.