The Mercedes-Benz O405 was a single-decker bus manufactured by Mercedes-Benz from the mid-1980s to the early 2000s as either an integral bus or a bus chassis and was the last VöV SL-II standard bus in production. It was the replacement for the Mercedes-Benz O305 and was widely used in Europe, the United Kingdom, Australia and Singapore with 12,000 produced.

The Mercedes-Benz O305 was a single deck and articulated bus manufactured by Mercedes-Benz in Mannheim, West Germany from 1969 until 1988. It was built as either a complete bus or a bus chassis and was the Mercedes-Benz adaptation of the unified German VöV-Standard-Bus design, that was produced by some different bus manufacturers including Büssing, Magirus-Deutz, MAN, Ikarus, Gräf/Steyr, Heuliez, Renault, and Pegaso. The O305 was designed for use as a single-decker bus, however it was later redesigned to accommodate double-decker bodies.