The first new Lanz models introduced after the war were presented in 1952. The smallest models in the lineup, the so-called HE models D 1706 (17 hp) and D 2206 (22 hp), were successors to the D 5505. A new feature in the 1952 Lanz Bulldogs was the semi-diesel engine that replaced the glow plug start; it was started with gasoline, and once the engine had warmed up, it was switched to diesel. The engine's compression ratio was increased from the previous 7.5:1 to 11:1, and fuel consumption was promised to be significantly lower than before. In addition to the 28-liter fuel tank, there was a 2-liter gasoline tank and a 3-liter lubrication oil tank. Lubrication oil consumption was promised to be 0.75 kg per working day. Also new in the technology was a single-disc dry clutch. The gearbox was the same 6+2-speed as in the predecessor. The hydraulic lift was an optional extra. The electrical system was changed to 12 volts.

In 1955, the D 1706 and D 2206 were replaced by the short-lived models D 1906 and D 2216. These featured a new rounder hood design, anticipating the next new models. The hood could be tilted forward for maintenance work.

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