It was mainly manufactured in Germany, Belgium, and the United Kingdom, although Sierras were also assembled in Ireland, Argentina, Venezuela, South Africa and New Zealand.
Vyrábal sa predovšetkým v Nemecku, Belgicku a Spojenom kráľovstve, hoci Sierry boli tiež kompletizované v Argentíne, Venezuele, Južnej Afrike a na Novom Zélande.