In the mid-1950s, Lanz also noted that the largest quantities on the German tractor market were the smallest tractors, which it did not have to offer. Therefore, the D 1266 and D 1666 models were introduced, equipped with 12- and 16-horsepower MWM diesels. The transmission was a ZF 6+1. The history of these models lasted less than a year and they were replaced by the D 1306, which had a 0.5-liter 2-stroke diesel engine from TWN, also used in Alldog. As with Lanz, this engine was designed to produce the highest torque at the same engine speed as the peak power. The problem was that this speed was 2800 rpm. The transmission was a ZF 6+2. The D 1306 had a power take-off shaft both at the front and the rear.

In 1956, the smallest 11-horsepower D 1106 Bulli was introduced. Unlike other models, the Bulli had a separate frame, which allowed implements to be attached between the axles.

In 1958, the D 1106 and D 1306 were replaced by the D 1206. Its engine featured a glow plug. At this stage, the color scheme changed to green and yellow.

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