No owners manual??

Those are typically the high beams so would be stalk-controlled (i.e.,
push turn signal stalk forward for high beams, back for low beams). If
they are fog lights, on my car they are controlled by pulling the
headlight switch out from the dash - once for front and a second notch
for the rear light....

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA