fredricksujin

This feature is only available in our WordPress Ultimate CSV Importer Pro

You can use custom post type import as for as custom post type ui plugin is used for your car dealer fields in free version. For sliders you can used the short codes of supported gallery plugins as listed below.
1. NextGEN Gallery.
2. Gallery.
3. Slideshow.
4. WP Photo Album Plus.

Yes, you can go for a Live Demo Here

Which plugin are you using ? Our importer is supporting only for Custom Post Type UI plugin. ACF support is in roadmap.