The NSW TrainLink D sets, also referred to as the Mariyung trains, are a class of electric multiple units being built to replace NSW TrainLink's Intercity electric multiple unit fleet, slated to replace the entire V set fleet and allow the H sets to be reallocated to Sydney suburban services. The trains will operate on services from Sydney to Newcastle, Lithgow and Kiama. The first trains were delivered in December 2019, and are expected to enter service by December 2022.