Mercedes-Benz Will Launch Citaro Electric Bus This Fall

The all-electric Mercedes-Benz Citaro runs locally emission-free and almost silently, taking electric mobility using city buses to a new level. The 12-metre variant will celebrate its world premiere in September at the IAA Commercial Vehicles show, with the start of series production also taking place this year.

Citaro Electric Bus

With its range of low-emission and, going forward, locally emission-free city buses, Mercedes-Benz provides the answers in the quest for environmentally friendly local public transport. All of them are based on the best-selling Citaro, which in 2012 became the first city bus in the world to meet what is currently the most stringent emissions standard, Euro VI.

The basis of its drive system is provided by an electric portal axle with electric motors at the wheel hubs. The peak output of the motors is 2 x 125 kW, while torque is 2 x 485 Nm. It is an inherent feature of such motors that this is fully available right from the start, so ensuring appropriate dynamic performance even with a full complement of passengers.

Lithium-ion batteries with a total capacity of up to about 243 kWh are responsible for providing the power. These are split between up to a maximum of ten modules. As well as two battery modules on the roof, the standard equipment includes four modules in the rear of the bus. Depending upon customer requirements, a further two or four battery modules may be mounted on the roof.

This intelligent modular concept for the battery and charging technology means that Mercedes-Benz is able to offer transport operators the opportunity to configure the Citaro precisely to the individual requirements of the company, or even of each separate route.

The passenger compartment of the Citaro is heated in an energy-efficient manner by a heat pump, backed up by the usual side-wall fan heaters and the front heater. All components that give off heat are linked together, so keeping the amount of energy required for their cooling to a minimum. During the colder months, the roof-mounted air-conditioning system is used in addition as a heat pump. The use of CO2 as a coolant brings further benefits. It’s very efficient use of the heat pump, even at very low temperatures, is impressive.

Another boon: the interior can be conditioned up to and even beyond the desired temperature while the batteries are still being charged at the depot. The bus will therefore have been heated or cooled before it sets off.

Electric mobility means rethinking the way buses are used for urban mobility. The all-electric Citaro forms part of Daimler Buses’ integrated eMobility system.

Service, maintenance and repair requirements change with electric mobility. The eMobility service provided by the Omniplus service brand therefore offers tailored service concepts. Options range from the classic supervision of the customer’s workshop through to workshop services allied to service contracts, completed in Daimler-based competence centres and, at the top end of the scale, BusDepot Management: in this case Omniplus employees undertake a defined scope of work, which may extend to full all-round service management of the vehicles, directly at the customer’s workshop.

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