The seat covers of the new C-Class Saloon include 15% pure sheep's wool, for example. The result is better moisture absorption and an improved seat climate. Other natural materials in the interior include flax, hemp, sisal and coconut fibre. Mercedes-Benz is also the first automotive manufacturer to use renewable raw materials both for the exterior and interior. Fibres obtained from the abaca banana plant, for example, partially replace the conventional glass fibre structure of the spare-wheel well in the Mercedes-Benz A-Class Coupé. A positive side effect: this requires 60% less energy compared with the manufacturing process for conventional glass fibre structures.