The Leopard 2E is a derivative of the 2A6, with greater armour protection,[50] developed under a program of co-production between the defence industries of Spain and Germany. The program was developed within the frame of collaboration decided in 1995 between the Defence Ministries of both countries, in which also was included the cession of use by a period of five years of 108 Leopard 2A4 from the German Army to the Spanish Army. However, this cession was extended up to 2016, and after that those tanks will be the sole property of the Spanish Army, as has been made public on 24 January 2006, then having been paid a total of 15,124,014 euros in ten yearly installments, giving the Spanish co-ownership from 2006. In 1998, the Spanish government agreed to contract 219 tanks of the Leopard 2E line, 16 recovery tanks Leopard 2ER (Bufalo) and 4 training vehicles. They chose Santa Bárbara Sistemas as the main contractor. The program, with a budget of 1,939.4 million Euros, includes also the integrated logistical support, training courses for crew instructors and maintenance engineers and driving, turret, maintenance, aiming and shooting simulators. Deliveries of the first batch began in 2004 and should complete in 2008.
