The Müller STA310 is a four-wheel drive (4WD) tractor built in Brazil by Müller, a part of Proton Primus. Produced from 2002 onwards, it features a powerful Scania 11.0L 6-cylinder turbocharged diesel engine delivering 310 hp (231.2 kW). The tractor has a 12-speed transmission with 12 forward and 2 reverse gears, utilizing a six-speed gearbox with a two-speed transfer case. It offers a wheelbase of 129.9 inches (329 cm), length of 248 inches (629 cm), and a minimum width of 137.8 inches (350 cm). The weight is 28660 lbs (13000 kg) with a ballasted weight of 33730 lbs (15299 kg). The tractor is equipped with planetary final drives, articulated power steering, hydraulic wet disc brakes, and a cab with air-conditioning. It has a fuel capacity of 200.8 gallons (760.0 L) and a hydraulic system capacity of 31.7 gallons (120.0 L). The hydraulic system operates at 2000 psi (137.9 bar) with a pump flow of 30.6 gpm (115.8 lpm). Electrical charging is provided by a 65 amp alternator at 28 volts. The STA310 is related to the earlier Müller TM310 model produced from 1990 to 2002.