What year is your ride ?
If you have the facelift model you can change the headlights ( + xenon bulbs, xenon modules, cables and leveling kit).
If it's not facelift for the headlights you need a new face (new bonnet, wings, new spoiler etc etc )
I have just bought a 60plate a3 2.0tdi i am looking to add drl is the posible and if so how would i go about it many
P.s i am new to this form first post