Guarantee case – How to deal with it?

Hello dear ones, since I am quite a layman and here one or other professional is on the road, I ask here for short advice. I recently got a new car. After almost 300km the ambient lighting and thus also the dead angle assistant failed. The ambient lighting is annoying in the sense, but purely functionally not meaningful. The rides without the dead angle assistant, on the other hand, annoy me already animally … Especially since this also a So I wanted to ask how long the dealer usually has time to repair this? Thank you very much in advance!