I have some details from the WASt: they say it's F6+FP, the plane was 6.(F)/122 but the crew members were 4.(F)/122. They also say that the cause was "a too early ground contact during landing" (sorry for the translation) wich cannot be because the plane was flying in the opposite direction from the airfield in Bergamo. It crashed on a mountain, it was at about 9 pm.
I also can't understand why they were flying so low.. Was it a normal decision to make it harder to be seen by enemy fighters ??
A witness also told me that one wing/engine was burning before the impact, and some debris I found seem to confirm this (maybe because of low quality fuel).

And what about the night recce over Corsica mission? What do You think about it? Is it true(the WASt doesn't mention it)? The Ju 188 was flying North, but Corsica is SW from Bergamo. My theory is that they wanted to fly along the Alps to avoid enemies, but it's just my idea..
Unfortunately I don't own the book, I'll try to buy it!

Thank You again..