Harsewinkel / Bad Saulgau, July 2014. Over the past few years, CLAAS has concentrated its tractor development efforts on the power segment above 140 hp and has successfully modernized and expanded this sector with a range of innovative products. Now, CLAAS is proving its innovative force in the lower power segment, too, and regenerating its standard tractor range below 140 hp. The new ARION 400 has been completely revised from the engine to the roof. With its power outputs and numerous equipment options, it's the right tractor for any purpose.