Construction of the prototype started in February 1942 but suffered a serious setback in March, when Daimler said that the DB 603G engine would not be ready in time.
在1942年2月原形機開始進行組裝但到3月份就遇到嚴重的挫敗，然而當戴姆勒告知DB 603G發動機無法在此時完成。