In 2003, the Lexion 500 series cylinder threshers introduced were the 570 and 580. The smaller model used the same 12-liter Caterpillar engine as the earlier flagship 480, while the 580 was fitted with a 16-liter V8. The nominal power ratings were 371 and 430 hp, but at 100 rpm lower engine speed the DIN ratings were 401 and 480 hp. As before, the 570 came with a narrower threshing unit. Its discharge conveyor was built from extendable plastic sections.

The widest headers were now also available in length-adjustable Vario versions. The optional Laser Pilot was installed at both ends of the header. The cab had been updated mainly in terms of its controls. The CEBIS system now offered GSM connectivity, allowing data to be transferred to a home computer. Noise level in the Lexion cab was 75 dB. The 570 was also offered in a Montana hillside-harvesting version and the 580 in a Terra Trac rubber-belt version.

For 2006, a lower-power base model, the 570C, was introduced and the engine outputs of the other models were increased. In some countries, the updated 570 was badged as the 570+.

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