license plate and unit markings

[anmarlodz]

guys could you please help me to find unit and and vehicle which was using the following license plate WL 292960 and unit marking which is oak leave and blue upside down triangle with red outside line and with two letters "S" and "Z" written in .
During the last excavation trip I found (last weekend ) what seem to be a big piece of aluminium made back left wing doors from truck with the license plate number and unit markings and big red cross painted on it.
in the same place we found ( I and my friends ) big , thicksteel barrel with writting VACUUM on the bottom and few pieces which we haven't dug out yet ( we hope to do it in nearest future ).

[anmarlodz]

here are the photos fresh after dug out.

[anmarlodz]

another shots ; painted lincense plate and red cross.

[anmarlodz]

and another ; unit/s markings

[anmarlodz]

is there anybody who could help me identify unit and type of vehicle it could be from ? please help me . where I can find informations about vehicle which had this licence plate ?

[Luft 76]

No doubt possible, it is a part of a vehicule of Lw Herman Göring Division (oak leef in a white rectangular form). But I don't know the other "V" colored symbol.
About typ of vehicule, it's probably an Horch or Phänomän Gränit "all metal" serie, for medical purpose.