These buses were powered by the turbocharged and intercooled Mercedes Benz OM447hLA engine (11,967cc) that is Euro II compliant, and was fitted with either the 4-speed ZF 4HP 590 automatic (TIB1183G to TIB1187X) or 3-speed Voith D863.3 automatic transmission (TIB1188T to TIB1197S).
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 the Batch Two Volgren O405Gs had larger windows. Batch Two units were registered TIB1183G to TIB1197S. These buses are usually seen on Woodlands feeder services at the northern section of Singapore.