How do I make a CarGurus feature request?

I think CarGurus is a great site, but there are a couple ways I think it could
be better. There's a big difference between 200 and 500 miles, in my
opinion. I would love for the distance selection to be a slider bar like some of
the other selections or at least have a few options between 200 and 500.
Also, I would like the option of not seeing listings where the mileage is not
given. I do not want to see those ads. Thanks and keep up the good work.