These buses were powered by the turbocharged and intercooled Mercedes Benz OM447hLA engine (11,967cc) that is Euro II compliant, and Batch One Volgren O405Gs were fitted with 4-speed ZF 4HP 500 automatic.
EDS was from Transit Media and underfloor air-conditioning by Konvekta or Hispacold. The two exits of each Volgren O405 unit were fitted with plug doors, and Batch One Volgren O405Gs had standard-sized windows. Batch One units were registered TIB1178Y to TIB1182J (excluding demonstrator TIB1024H). These buses are usually seen on Woodlands feeder services at the northern section of Singapore.