High Quality Content by WIKIPEDIA articles! The "3000" class railcar diesel electric diesel multiple units are the main workhorse of TransAdelaide`s suburban passenger operations in Adelaide, South Australia. There are two variants: 3000 series, featuring a cab at each end and capable of running as a single car, and the 3100 series with one cab which are semi-permanently coupled into two car sets. Seventy cars were introduced into service between 1987 and 1996 with the first 20 built by Comeng between 1987 and 1989 numbered #3001-#3008 and #3101-#3112, and the remaining 50 built by Clyde Engineering between 1992 and 1996 numbered #3009-#3030 and #3113-#3140. All 70 cars were built in Dandenong, Victoria.