Intended as a progressive development of the twin-engined Bf 110 Zerstorer (‘destroyer' or heavy fighter), the Me 210 first took to the air in September 1939. However, due to a lack of sufficient flight-testing before being declared service-ready, the Me 210 suffered from a less than satisfactory reputation in respect to its flight characteristics and weak undercarriage. After enhancements were made to the fuselage and wings, and the power of the plane was increased, the Me 210 became the Me 410 in late 1942.