In 1968, the largest 6-cylinder model introduced was the Super 1250. It had a 7.1-liter, 110-horsepower engine. The transmission was the same ZF partially synchronized 12+6 as in the smaller 6-cylinder models. Later, the 1150 and 1050 came between the Super 950 and 1250. A more powerful 6-cylinder engine was obtained in 1970 by turbocharging. The 1500 TV replaced the earlier 8-cylinder 1500 V. This model had a lifting capacity of 5600 kg, which was significantly more than before. In 1972, slightly more powerful and longer L-models of the 1250 and 1500 were introduced.

For export markets, slightly more powerful variations of the Schlüters were manufactured. In many cases, the engine's nominal speed was raised from 1800 to 2000 rpm. The model designation indicated the engine displacement. For example, the Super E 7200 corresponded to the Super 1250, with power output of 130-135 hp. The most important export regions were Southern Europe and the Arab countries. Another variant deviating from Schlüter’s standard range was the forest-use versions, designated with the code SV. Forest models featured, among other things, a rotating control console, very thorough underbody armor, and mesh guards for the front and rear windows.

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