Interior material is a frequent authenticity discussion: leather was standard on the 450SEL with velour a no-cost option, and no 6.9 came with MB-Tex only leather or velour so MB-Tex on a 6.9 is flagged as incorrect. MB-Tex vinyl is considered near-indestructible, and tears in it are read as a sign of higher-than-stated mileage.
Upholstery: MB-Tex versus leather versus velour
Mercedes-Benz S-Class (W116) · cosmetic