November 26: The Untertürkheim plant is the target of a British night-time air raid. By the end of October the company management calculates that damage worth RM 70 million has been caused by aerial bombardments.
One year after series production had come to an end, manufacture of the W 153 was resumed. Between April 1943 and February 1944, 34 units of a newly developed version for generator gas operation were produced. However, these so-called "wood gasifiers" were not equipped with the 2.3‑litre M 153 engine, but were powered by a special version of the M 159.
A total of 88 units of the W 150 were produced, half of them in 1939 alone. With just one vehicle being built in each of 1940 and 1941, production rose again in 1942/43 to 29 vehicles, almost all of them in the armour-plated version. The last three chassis units were manufactured at the Untertürkheim plant in June 1943. The open tourer, with 46 units, was the most popular body variant of the W 150, followed by the pullman saloon with 18 units and the armour-plated four-door saloon with 10 units. Convertibles F and D were produced in seven and five units, respectively, with one Convertible B and one chassis also being built.
In November 1943, an order was received for a further 17 replacement bodies of the 540 K type.