I need your help.

I need help finding an Audi S6 Sedan hotwheels (1:43 ofc) under 15 pound. I really need your help here.

 

in game or irl?

 

irl

 

I'd ask around the model cars thread for recommendations, as this board is for the general discussion of BeamNG.
https://beamng.com/threads/model-cars-scale-cars.9476/

For an answer, as far as I can tell Hot Wheels hasn't made an S6 Sedan, but apparently Maisto's Adventure Force line has one?

 

Hot Wheels are approximately 1:64, 1:43 is much bigger than that.
And for now Hot Wheels only has a casting for the 2017 RS6 Avant, and Matchbox has a casting for the 2002 RS6 Avant. Mattel do not yet make a Sedan model.
Kyosho have a 2006 S6 Sedan casting but they are often much more expensive than £15

There are probably more options when it comes to 1:43 scale, but that wouldn't be Hot Wheels.

 

Can you link it?
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Oh.