This certainly isn't something one would see every day. At first glance, nothing appears unusual about this train, found at Sydney Terminal, platform two. A second glance would reveal that this four-car "S" Set suburban train consists entirely of motor cars! Don't be confused, this isn't set "S101" at all, although the lead car would have you believe it. The four motor cars were C3063, C3982, C3044 and C3949 (in the order presented above, thanks Mick).
Over the first week of August, 2013, the AK Track Recording Cars made one of their last runs around the Sydney metropolitan rail network. To remove the requirement to use diesel locomotives in the underground (City Circle, Eastern Suburbs, New Southern Railway and Epping to Chatswood Rail Link), trials had previously been conducted using surplus suburban electric rolling stock. Over the week, the AK Cars were operated with two suburban electric motor cars bracketing the set of three track recording vehicles. With the program finished, the four motor cars have been re-marshaled for return to Flemington Maintenance Centre.