Mercedes-Benz O530 Citaro

梅斯特斯平治O530 Citaro (平治) [Config : B38Dw]
Following a successful trial on the demonstrator unit SMB136C, SMRT Buses purchased a further 50 units of the Citaro (Mk II or facelift version) in two batches. On 21 March 2011, these production batch buses began their debut on services 75, 531, 920 and RWS8 Staff.

The modular nature of the Citaro meant that production orders for both SBS Transit and SMRT Buses were rolled out from the same factory and to a degree share common features, such as the bodywork and the driver's dashboard.

Changes to the production batch Citaros are mainly aesthetic - the production units were fitted with Lawo BENEFIT EDS (notably with route details on the side EDS), seat covers in its corporate livery and swing-out doors. SMRT Buses retained its option of the OM906hLA engine (6,374cc) along with its ZF Ecomat 6HP592C (6-speed automatic) gearbox for Batch One, but matched up with SBS Transit's choice of Voith DIWA 854.5 (4-speed automatic) transmission for Batch Two buses. The interior is fully low-floor and its air-conditioning was supplied by Konvekta. Both operators have also customized their interior fixtures to a certain extent in order to blend in with their existing WAB fleet.