Luxury automakers have a history using different materials in their vehicles. The body structure of the Audi A8 combines four different lightweight design materials – a mix of aluminum, steel, magnesium and carbon fiber-reinforced polymer (CFRP). A high-strength combination of hot-formed steel components make up the occupant cell, which comprises the lower section of the front bulkhead, the side sills, the B-pillars and the front section of the roof line. Some of these sheet metal blanks are manufactured in varying thicknesses by means of tailoring technologies – they’re tailor-made in other words – and others also undergo partial heat treatment. That reduces weight and increases the strength, especially in areas of the vehicle that are particularly critical for safety.