Your data plate should have a code of C26, in addition to interior code of P5xx, P6xx or PRxx. I believe those are the "Premium" interiors Cloth, Vinyl,and Leather that had the overhead console. Also, not that this is definitive, but check for clips along the inside where the molded headliner would meet the interior trim above the side windows. My Gran Coupe has them, but i have had several folks tell me theirs did not.