(http://media.il.edmunds-media.com/mercedes-benz/s-class/ns/mercedes-benz_s-class_actf34_ns_31511_196.jpg) German tuner Inden Design upgrades the S500 with an aero body kit and more power. The kit includes front and rear spoilers, a rear diffuser and side skirts. Inden fits an AMG stainless-steel exhaust system with twin tailpipes.
Source: Inden Tunes Mercedes-Benz S500 (http://www.insideline.com:80/mercedes-benz/s-class/inden-tunes-mercedes-benz-s500.html)