looks like there is a difference in the leather used in the 300 Touring, 300 Limited and 300C. The 300C get the pebbled textured leather as in E and F:
300 - Cloth available in dark slate gray [A] with light graystone upper trim [1] or medium slate gray [b] with dark slate gray upper trim [2]
300 Touring - Leather trim available in light graystone [C] with dark slate gray upper trim [2] or with deep jade upper trim [3], or medium slate gray [D] with dark slate gray upper trim [2]
300 Limited - Leather trim available in light graystone [C] with dark slate gray upper trim [2] or with deep jade upper trim [3], or medium slate gray [D] with dark slate gray upper trim [2]
300C - Premium leather trim available medium slate gray [E] with dark slate gray upper trim [2] or in light graystone [F] with dark slate gray upper trim [2], or with deep jade upper trim [3]