Thank you!
So it was a Bergepanther with a Panzer IV turret bolted on top.
A reply on War Thunder's history forum that may or may not be correct:
"Well it was not actually a functioning tank. The Panzer V/IV was actually a field modification made by Schwere Panzerjager Albt 653 (Or was it 356) whereby a Bergepanther had a Panzer IV's turret bolted on to it to act as a roof and provide more stowage space. The turret could not rotate and to this day there is still no evidence that the gun was active."
Some more pictures
