Hello Luis Bravo, thank you very much for your question. Trying to solve it, I was able to learn new Odoo functionalities. I hope the below method is useful for your problem.

1-      Prepare an excel template with attributes and values (just if you what to import)

2-      Import/Create attributes and values. Make sure you are using Odoo field correctly.

3-      Prepare an excel template with your products. The below sample template is just an example for attribute and value fields. Perhaps more fields are needed in order to solve other functionalities, like: product type, category, among others.

Important: If you want to import multiple values for an attribute, you need to separate them by comma.

Note: In order to show all your cars in your website shop, I suggest you create a product template for every car type.

4-      Import product templates. Make sure you are using Odoo field correctly.