The third generation of the Xerion system tractor was introduced alongside the previous one in autumn 2009. The Xerion 4500 and 5000 were significantly larger than their predecessors. For example, the curb weight had increased from 10.2 tons to 13.4 tons. The Caterpillar 12.5-liter engines had a rated power of 449 and 487 horsepower. The transmission was ZF's stepless Eccom 4.5. The axles were manufactured by Hungarian company Raba. The cab was air-suspended. Its noise level was specified as 69 dB. The cab could be rotated to the center or rear in 30 seconds. The electrical system was 24 volts.

In the 2014 model line, the old 3000-series Xerions were discontinued. Accordingly, a lower-powered 4000 model was introduced. Alongside the Trac VC, which featured a rotating cab, a cheaper Trac model and the Saddle Trac with a cab placed at the front were introduced. The engines were changed to Tier 4-compliant Mercedes-Benz units that used SCR technology to reduce emissions. Alongside the Eccom 4.5, a cheaper and 700 kg lighter Eccom 5.0 transmission was available, recommended for fieldwork. The wheelbase was extended by ten centimeters for 2014.

In the 2020 model lineup, the Stage V emission standard was adopted. The Xerion 4000 was replaced by the more powerful 4200, which had 30 more horsepower. Other models also featured increased torque. Standard equipment included the Cebis display and the Cmotion joystick with programmable buttons. In the new Xerion Trac TS models, the wheels were replaced by four tracks.

In 2023, the 5000's powertrain was changed to the Eccom 5.5.

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