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. These buses utilize BlueTec 5, the selective catalytic reduction (SCR) technology by Mercedes-Benz requiring the use of AdBlue, to meet the Euro V emission standards.
SBS Transit units also received the OM906hLA engine (6,374cc), but opted for the Voith D854.5 4-gear automatic transmission and Lawo HighLED EDS (with Luminator USA ODK 4, predecessor of Lawo TOUCH-Control). 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 and corporate identity.
Batch 1 Citaros are registered SBS6000L to SBS6285G, with certain omissions.

- SBS6000L-232-B
- SBS6000L-232-C
- SBS6000L-232-D
- SBS6000L-232
- SBS6000L-28-B
- SBS6001J-28
- SBS6002G-138
- SBS6003D-138-B
- SBS6004B-162-B
- SBS6004B-162
- SBS6006X-16
- SBS6006X-502
- SBS6006X-52
- SBS6006X-OS
- SBS6007T-28
- SBS6008R-28-B
- SBS6008R-28
- SBS6009M-238-B
- SBS6009M-238
- SBS6010H-53-B
- SBS6011E-53-B
- SBS6011E-53
- SBS6011E-58
- SBS6012C-53-B
- SBS6012C-53