@media screen and (min-width: 500px) {
    ul#car_featureschecklist {
        -moz-column-count: 3;
        -moz-column-gap: 20px;
        -webkit-column-count: 3;
        -webkit-column-gap: 20px;
        column-count: 3;
        column-gap: 20px;
    }
}