The Mercedes-Benz OC 500 LE is a modular, heavy-duty, twin-axle bus chassis produced by Mercedes-Benz/EvoBus Ibérica, Spain. It was designed as a modular platform for low-entry city, suburban, and intercity buses with a maximum gross vehicle weight of 19.1 tonnes. The main modules consist of: driver's pedestal, front axle, buggy centre section, drive axle and engine. It has much in common with the chassis used for the Mercedes-Benz Citaro integral bus range, and also the raised floor OC 500 RF coach chassis. The engine is horizontally mounted over the rear overhang. Mercedes-Benz in Brazil manufacture a low-entry chassis known as the O 500 U, which is related to the OC 500 LE, but is not identical. It is also available as the articulated O 500 UA and the quad-axle articulated O 500 UDA, with the latter giving a vehicle length of 23 metres. The O 500 U is also available in Australia, marketed as OH1830LE. Technical details Variations OC 500 LE 1825h Engine type: OM 457 hLA (Euro III) inline 6-cylinder 11.967-litre turbocharged intercooled, direct injection diesel Power: 185 kW (252 hp) @ 2000 rpm Torque: 1100 N m (811 ft·lbf) @ 1100 rpm OC 500 LE 1825hG Engine type: M 447 hLAG (Euro IV/Euro V/EEV) inline 6-cylinder 11.967-litre turbocharged intercooled, lean burn, spark ignition single point injection CNG Power: 185 kW (252 hp) @ 2000 rpm Torque: 1050 N m (774 ft·lbf) @ 1000-1400 rpm OC 500 LE 1830h Engine type: OM 457 hLA (Euro III/Euro IV/Euro V/EEV) inline 6-cylinder 11.967-litre turbocharged intercooled, direct injection diesel Power: 220 kW (299 hp) @ 2000 rpm Torque: 1250 N m (921 ft·lbf) @ 1100 rpm OC 500 LE Euro VI Engine type: OM 936 (Euro VI) inline 6-cylinder 7.698-litre turbocharged intercooled, direct injection diesel Power: 220 kW (299 hp) @ 1200 rpm Torque: 1200 N m @ 1200-1600 rpm Initially available with Euro III engines, the OC 500 LE chassis got upgraded to Euro IV, Euro V and EEV-compliant diesel engines using AdBlue Selective Catalytic Reduction technology. With Euro IV, Euro V and EEV, the 252 hp rating of the OM 457 hLA was discontinued, making the 299 hp engine as standard for the OC 500 LE. It is also available with the OM 936 engine in Euro VI markets. Transmissions Currently, Mercedes-Benz only offers a ZF EcoLife 6-speed automatic transmission with integrated hydraulic retarder (model 6 AP 1200 B for