Siemens Desiro
Nine Siemens Desiro sets were purchased. City services is operated by five three-car trains, and the Express services by four trainsets with a fourth car for check-in baggage. The first trains left Germany in September 2007, and testing in Bangkok began in March 2008. On 15 May 2012 the Thai Cabinet approved a budget of 5.2 billion baht for the SRT to order 7 new, 4 car sets of Siemens Desiro rolling stock to be delivered by 2014. However, as of June 2013 no order for new rolling stock had yet been placed. The Ministry of Transport was considering purchasing cheaper CNR or CAF rolling stock which would require changing the Siemens closed signalling system to an open system.