This index monitors high-end luxury sedans, tracking executive transportation, chauffeur-driven elegance, and four-door luxury performance. It includes key models Rolls-Royce Phantom, Bentley Mulsanne, Mercedes-Benz S-Class, BMW 7 Series, Audi A8, Jaguar XJ, Maserati Quattroporte, Aston Martin Rapide, Porsche Panamera and Cadillac Eldorado.
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