The Mercedes-Benz OC 500 LE is a modular, heavy-duty, twin-axle bus chassis produced by Mercedes-Benz/EvoBus Ibérica S.A. in Sámano, Spain. It was designed as a platform for low-entry city, suburban, and intercity buses weighing a maximum of 18,000 kg. It has much in common with the chassis used for the Mercedes-Benz Citaro integral bus range. The engine is horizontally mounted over the rear overhang.