I found this info.... the one of Werk Nummer 130184 ( coded E3+32 ) was tested in Rechlin base and was powered by BMW-003 engines. The one of Werk Nummer 170078 was found at the Lechfeld airfield 1945.
The second one,E3+32,has the wrong werknummer. It should be 130164. It's not the first time that mistake has been made,but repetition doesn't make it correct
It is a well known test aircraft flown at Rechlin where it was delivered on 5th July 1944. It flew with Jumo 004 engines and,later, with BMW 003 turbo jets.
I haven't had a look but I'd be surprised if there weren't some photographs of this machine.
170078 was another aircraft used for testing the BMW engines. I know of pictures of this aircraft,badly damaged,taken at Lechfeld at the end of the war.
The profile above is very similar to one in Smith and Creek's Me 262 Vol 2.