Driving impression: Claas Axos 340 CX Launched at the end of 2008, Claas’s new Axos tractors replace the Celtis models, but don’t claim to lead the technological pack; instead they set out to be straightforward machines for the international market. A redesigned bonnet hides a fourcylinder Perkins Tier 111 engine with mechanical injection and EGR, rather than the previous DPS Deere motor