As of 2022, the City Gold has been launched with diesel,[1] compressed natural gas (CNG),[2] hydrogen fuel cell[3] and full electric[4] powertrains.

The first vehicles in the City Gold range entered service in Barcelona in 1997; these were constructed on Mercedes-Benz O405N chassis, featuring Mercedes' own front end design.

With the cessation of production of the MCV Evolution and Plaxton Centro and with Alexander Dennis no longer willing to provide the ADL Enviro200 on MAN chassis, the CitySmart was at this time the only bodywork available for the 14.240, which otherwise would have exited the British market at this point.

[8] Further example of the EcoCity, with facelifted bodywork to match the recently launched electric model, entered service in Lisbon and Porto between 2018 and 2021.

[9] The hydrogen-powered H2.City Gold on CaetanoBus chassis has achieved numerous sales, predominantly in Germany as of 2022; examples have entered service in Bielefeld,[10] Cottbus,[11] Düren[12] and Wiesbaden.