The Devil being in the details, I did a double-take at this one.
I've read about wood-fuel vehicles, but I've never seen one - what sayeth the Peanut Gallery?
There's actually a lot of those photos in different places. Holzbrenner Volkswagens or Holzgasfarzeuge will show a lot of photos, as well as "wood gas" vehicles.
https://tanks-encyclopedia.com/ww2/nazi_germany/gas-powered-fahrschulwanne-tanks.phpMore interesting to me is the quite rare Panzer III Ausf. G/H mit Schachtellaufwerk in the lower left. That actually looks to have been repainted in dunkelgelb, which I've never seen before.
Cheers,
Logan