Mercedes-Benz OC 500 LE

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.

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 the 252 hp CNG engine or model 6 AP 1400 B for the 299 hp diesel engine). Previously available was the Voith D864.3E 4-speed automatic transmission as well as the ZF Ecomat 5 HP 502/592 5-speed and 6 HP 502/592 6-speed automatic transmissions.

Australia
Large numbers of buses built on the OC 500 LE chassis can be found in Australia, where it was originally marketed as the O 500LE. then got renamed as the Mercedes OC 500 LE. Now, it is marketed here like in the world, as OC 500 LE.

Transperth operate 540 Volgren bodied examples, 474 being CNG powered. There have been 15 OC 500 LE CNG fires in Perth, and in October 2013, the Public Transport Authority commenced legal action against Mercedes-Benz, Evobus and Volgren. The action was dropped in 2014.

Sydney Buses purchased 255 CNG and 20 diesel powered examples, all with Custom Coaches bodies, however one CNG example (m/o 4878) was destroyed by fire in June 2011. This bus was then replaced in the Sydney Buses fleet with the Custom Bus CB80 demonstrator O500LE, now bearing registration m/o 4878 and body number 08-001.

The O500LE CNG models are powered by the M447hLAG 252HP engine, as noted above in OC 500LE CNG 1825hG.

There are two gas tanks (indicated by two CNG stickers on number plate) located on top of the bus near the front. Metal pipes run on the offside roof to the back of the bus. Because the gas tanks are in the front, the air conditioning unit is placed at the rear of the roof. The gas tank placement is counter-intuitive, but this is due to the various weight requirements imposed by the RMS.

Other purchasers included Ventura Bus Lines (72), Brisbane Transport (40), Premier Illawarra (38), Kefford Corporation (19) and Darwin Bus Service (14).

Many operators across Australia have now purchased the OC 500 LE in various configurations. Problems related to quality control and unreliable electronics have not been uncommon. A lot of these complaints have come from drivers due to some units being under-powered, uncomfortable or rough.

Brisbane Transport withdrew its OC 500 LEs from the fleet for a short period because of a major unidentified fault which caused buses to suddenly accelerate without warning. This problem was fixed by Mercedes-Benz and these vehicles are now back on the road. However, as they were under lease from Mercedes-Benz, their lease expired in 2013 and were then sold to Transit Systems NSW where they currently operate.

In January 2009, Mercedes-Benz Australia issued a recall on 443 CNG-fuelled OC 500 LE units due to respecified welding specifications for the turbocharger oil supply pipe.

Singapore
SMRT Buses had taken delivery of 134 Mercedes-Benz OC500LEs for fleet replacement and expansion. These buses feature bodywork built by Gemilang Coachworks of Malaysia and assembled by Thonburi Busbody Limited of Thailand, with a CapaCity licensed front from Mercedes-Benz, engines that meet Euro V emissions standards and are SMRT's first wheelchair accessible buses (WABs). They were the first to feature voice announcement system, with announcements similar to the ones used on the MRT. They are also the first buses in South-East Asia to be fitted with a Euro V engine. The last bus to be registered, SMB134H, was registered on 1 October 2009.

The first OC500LE took part in the launch of SMRT's Go Green event on 30 April 2008, which is SMB1H and entered revenue service on Service 190 first. Because service 190's demand is high, it was redeployed to other services and KJDEP training bus. SMRT Buses had ordered 67 Mercedes-Benz OC500LE buses as the first production batch in 2007 (delivered from 22 September 2008) and another 67 Mercedes-Benz OC500LE buses in 2008 (delivered from 1 June 2009).

Since April 2021, all Mercedes-Benz OC500LEs are repainted into Lush Green livery. The first OC500LE from SMRT Buses was transferred to Tower Transit in SMRT livery before repainting it to Lush Green livery.

United Kingdom
Small numbers of OC 500 LEs bodied by MCV have entered service in the United Kingdom. The first bus was unveiled in March 2010, and was also exhibited at IAA Hanover 2010. A number have been purchased by Carousel Buses for use to and from Heathrow Airport for express services.

Norway
In 2004, Vest Busscar bodied nine OC 500 LE 1825h with its Center L bodywork for Nettbuss. One was used in the Østfold region, while the other eight entered city traffic in Kristiansund. All eight OC 500 LEs in Kristiansund were exported in 2014, with some of them appearing in Estonia. No other OC 500 LE have been bodied, nor imported to Norway.

Portugal

 * Irmãos Mota Atomic UR2000, UR2005, UR2011, URB2014 and Urbis
 * Marcopolo Viale

Serbia
Ikarbus IK-112LE, in production as of September 2015, used in Belgrade urban and suburban bus system. Ikarbus offers 2 versions, with 2 or 3 sets of doors. More than 60 is produced. Ikarbus offers suburban version with softer anti-vandal seats and a place for hand luggage.

Spain

 * Unvi Urbis
 * Hispano Habit
 * Hispano Intea
 * Burillo
 * Sunsundegui Astral
 * Castrosúa Magnus
 * Noge Intertouring
 * Noge Cittour LE