The EC135 started development prior to the formation of Eurocopter under Messerschmitt-Bölkow-Blohm (MBB) under the designation Bo 108 in the 1970s.
O EC135 comezou a desenvolverse antes da formación de Eurocopter de mans de Messerschmitt-Bölkow-Blohm (MBB) coa designación Bo 108 nos anos 70.