In 1936, a smaller Lanz Bulldog than previous models was introduced. The lineup was named the HE series, and the sales name was D 4506. It had a 2.8-liter hot-bulb engine and a 6+2-speed transmission. Compared to even the larger Bulldogs, the equipment was abundant; standard features included steering brakes and a power take-off, and a hydraulic lift was available as an optional accessory. Only 300 units of the model were produced before production capacity had to be focused on serving the war industry.

In 1950, the model returned to production with minor changes under the name D 5506. The maximum power was now 16 horsepower, and the engine had received modern sheet metal cladding as its casing. The D 5506 was equipped with a 12-volt electrical system.

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