Perth was also the first Australian city to operate the articulated Mercedes-Benz O305G. Three batches were purchased with 18 in 1979, three in 1980, and 19 in 1986/87. The first and second batches had bodywork completed by JW Bolton and Howard Porter and featured model OM 407h 240 hp (177 kW) naturally aspirated engines. To overcome sluggishness, the buses in the third batch (also featuring Howard Porter bodies but built to the VöV-II design) were fitted with model OM 407hA 280 hp (206 kW) turbocharged engines.