The X73500 is a Diesel Multiple Unit (DMU) train type operated by the SNCF in France. They were built from 1999 to 2004 by Alsthom DDF. The trains are single railcars, and have been nicknamed Blue Whales (Baleines bleues) Cucumbers (Concombres) or Sausages (Saucisses). The units were ordered joint with Deutsche Bahn, with their Class 641 units. The trains have modern features which were new to TER trains, such as: The trains can work in multiple of up to 3 sets. X73813 - X7318 are former CFL (Luxembourg) units 2101 - 2106 and operate in the Alsace region. SNCF Class X 73900 is an identical version of the X 73500, but can also operate into Germany. The units are used on rural, unelectrified railway lines in France and are operated by all TER regions except Île-de-France, Corsica and Provence-Alpes-Côte d'Azur. They operate the following services: This list does not include all services.