The type variety of Renault makes identification of the vehicles rather difficult. This car - photographed during a river crossing - is most probably a Renault Vivastella. The vehicle belonged to Nachrichten Bataillon 101 of 101. Jäger Division.
In this design, the Renault Vivastella was made beginning in 1936. This nice photo was made in Luxembourg.
This Renault Vivastella of the last production model BDZ1 was equipped with an Imbert Holzgas Anlage - wood gas producer system - type W2 for engines up to about four litres cylinder capacity.