My Suggestions/Ideas
1. An Interior material selector. You don't actually see the materials in the car, but you know what the car is using for the interior! I don't know if this option would replace the interior options if it did happen, but It would be interesting anyway.
2. Car Generations. A selector like the trim/variant selector, but this time, you can put make the car in a different year with this option, and choose production years for each generation.