[Martin388]

Peter Achs's posting is definitely convincing. However I am not fully convinced. The general layout (Ju188 fuselage and 188-tail, no bomb bay [K-0 feature] visible, light gray color like other similar aircraft of a small production batch) of the aircraft with its BMW801TJ engines (therefore almost 100% a Ju388) is more likely to the L-0 30029x WNr block StKz DW+YY ff. Several a/c of that batch have been or were scheduled to be re-engined with Jumo213E (e.g. V31), and this could have been done at Köthen, where Junkers was specialiced for engine testing.
Of course there is the Lehman log book entry that would fit to war's end.
On the other hand, almost all 30000x Ju388 a/c look different and had a dark camouflage. Accorrding to my information 300006 (PG+YF) was for a change of its BMW801TJ engines at the end September 1944 in Köthen; its engines were planned to be used on the Ju388V2; no evidence that this materialized.
source: Junkers Ju388 Vernaleken/Handig
Maybe new information pops up? I would hope so.
Martin