in Melbourne. These include: 2+2 seating. All other trains had 2+3 seating, however X'Trapolis 100 trains ordered as part of the 2008 Victorian Government Transport Plans have the same 2+2 seating configuration, and existing X'Trapolis trains had their seats modified to a 2+2 configuration as part of the franchise agreement. Two doors per carriage per side. Being significantly wider they were theorised to be slightly more efficient in loading and unloading passengers, although this is disputed by some sources, who believe the fewer doors lead to longer platform dwell times compared to the three smaller doors in other Melbourne trains. Plug-type doors - hinged outward and slide along the outside of the vehicle when opening. Extreme smooth, vertical walls. Open articulation. Passengers can freely move from carriage to carriage, within a 3-carriage set, without opening doors, the first such train with this configuration in Melbourne. The Siemens Nexas trains are fitted with a Passenger information system produced by the German firm Annax. The system does not announce service details at the commencement of a journey, express running or the end of services. In June 2008 Connex started a program to replace the seat coverings in a number of Siemens Nexas trains, using the same type of fabric as used in the X'Trapolis 100 trains, Metro Trains Melbourne has since put in new seating fabric displaying various stations around the network, to almost half the fleet. Refurbishment In 2016 Metro Trains Melbourne began refurbishing the interior carriages of Siemens Nexas trains. All windguards and glass screens were removed from the doorways and replaced with a smaller vertical handrail (except where wheelchair access is required), a number of seats removed near the doors and extra vertical and horizontal handrails fitted to improve comfort and capacity. A cleaning program occurred at the same time, which included fitting new seat pads and covers, re-painting walls and applying anti-graffiti film to the windows. As of August 2017, the entire fleet had been refurbished. A similar refurbishment has been completed on the older Comeng trains. In 2019, Metro Trains Melbourne began to replace the Gangway systems. The new Hübner System has at the floor an articulated bridge system instead of the plate system. Also the sound insulation and the behavior of the bellows system has been improved. In August 2022, Metro Trains Melbourne completed a mid-life refurbishment on two 3-car sets in the fleet, thus comprising