Well, all three of them anyhow. Bus 585 was the first Mercedes O.305 delivered to ACTION, and was first registered as ZIB 585 on 11 November 1981. Departing the fleet in November 1995, it later joined the Ritchie's Transport fleet in Auckland, New Zealand.
(https://www.actbus.net/forum/proxy.php?request=http%3A%2F%2Factbus.net%2Fgallery%2Fvar%2Fresizes%2FACTION-Buses-Disposals%2F585-Mercedes-O.305%2FBus-585%2FBus%2520585%2520-%2520Giralang%2520Terminus.jpg%3Fm%3D1400068650&hash=5c04b100964c94164baf267024b3a61ff6eb4338)
The first livery, pictured at Giralang Terminus
(https://www.actbus.net/forum/proxy.php?request=http%3A%2F%2Factbus.net%2Fgallery%2Fvar%2Fresizes%2FACTION-Buses-Disposals%2F585-Mercedes-O.305%2FBus-585%2FBus%2520585%2520-%2520Belconnen%2520Depot.jpg%3Fm%3D1392198089&hash=575524eecdfe8f407e976dd2c751f7c94bd4be4c)
The second, at Belconnen Depot
(https://www.actbus.net/forum/proxy.php?request=http%3A%2F%2Factbus.net%2Fgallery%2Fvar%2Fresizes%2FACTION-Buses-Disposals%2F585-Mercedes-O.305%2FBus-585%2FBus%2520585%2520-%2520Belconnen%2520Depot%2520%25284%2529.JPG%3Fm%3D1431254198&hash=c11aefa69d5d9b82b9de0dfea2322273deb0ea82)
The final livery, also at Belconnen Depot.