![2000 Mercedes-Benz S 500 (ZAS) W220 (Automatic / 5 Gears) RWD [1998-2002]](https://i0.wp.com/i0.wp.com/autogalactic.al/wp-content/uploads/2026/01/abc-2000-mercedes-benz-s-class-frontside_mbs-001_505x375.jpg?fit=505%2C375&ssl=1&resize=360,270)
The 2000 Mercedes-Benz S 500 (ZAS) represents an innovative effort to increase efficiency in the W220 S 500 phase-I series by introducing the Zylinderabschaltung (ZAS) system. This technology allows the 5.0-liter V8 (M113) engine to automatically switch off four of its eight cylinders while driving at low load, significantly reducing fuel consumption without sacrificing the refinement expected of an S-Class. Although the maximum power undergoes a slight drop to 299 HP compared to the standard version, this model remains an extremely fast and technologically advanced vehicle, offering a royal ride thanks to the Airmatic suspension and excellent acoustic insulation.