Leopard 2E: A derivative associated with variation A5a developed under a program of comanufacture involving the companies of Spain and Germany. The program is developed inside the framework of collaboration decided in 1995 involving the Ministries of Defense of both nations, in which additionally the cession of use by a period of five years of 108 Leopard 2A4 through the German Army towards the Spanish had been. On 23 December 1998 the Spanish Cabinet authorized the comanufacture contract, designating Santa bara Blindados (SBB - Armored business Santa Barbara) while the primary contractor. The Leopard 2E/EX and its elements will likely to be made completely in Spain, with German technological support.