The Deutz DX series tractors introduced in the autumn of 1978 were equipped with air-cooled 5- and 6-cylinder engines. The DX 85 had a power output of 80 hp, and the DX 90 had 88 hp. The DX 110 (102 hp) was equipped with the old 5.65-liter six-cylinder engine. The torque increase figures of 10–13% were weak. The hydraulic performance figures were up to date, and the DX 110's lifting capacity of 5,150 kilograms was even among the best of its time. The 110 had draft sensing via pull rods, while the smaller models used push rod sensing. The DX series was among the first Deutz tractors where the four-wheel drive power was transmitted through a central axle. The front axle manufacturer was still the Italian company Sige.

The new flat-floor MasterCab cab was bright, but the noise level was a "full" 85 dB. Alongside it, a more basic EuroCab was offered in some countries. The fully synchronized transmission had 12+4 or 15+5 steps, and the gear levers were located on the side. Overall, the cab was a significant development compared to the 06 series.

In 1980, the front axle was equipped with an automatic differential lock, making it one of the first tractors to have this feature.

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