Good morning I have a problem with my head light on my 2017 s3 on the o/s the top led strip is dull compared to the rest would this mean a full new headlight thanks for any advice

Not necessarily a new headlight, but yes the LED DRL part can dull over time. My understanding is the DRL is a separate circuit board that uses a acyrilic light bar to transfer the light across the headlight.

You’ll need to take off headlights to investigate and fit, and means dropping the bumper. Sounds worse than it is. Usually Torx screws top and bottom and bolts under the wheel arch liners. Watch the parking sensor wiring and headlight washers if fitted. A bit of old carpet to drop it on to would be perfect.

Few videos on YouTube. Avoid EBay DRL deals, do your research as to who make these things. Valeo would have made the headlight originally. Probably be wise to change both for uniformity.