Hello Seaplanes and Rémi,
Thank you for the info. A Junkers data sheet that specifies the dimensions and equipment of the Ju 88 G-7 mentions that it was to be equipped with Jumo 213E.
8-8213D was the Luftwaffe designation of the Jumo 213E for Ju 88/388s (see
http://www.focke-wulf190.com/leistun..._Jumo213_2.htm).
Since one aircraft is yet missing engines and the other one (wrecked) did not have any propellers attached, I think these two aircraft were under conversion and incomplete when they were destroyed. They could be the two prototypes or already serial aircraft.
Roger