Tractor test: Claas, Deutz-Fahr, Fendt, John Deere, MF, McCormick, New Holland and Valtra The Good Cab Guide Never underestimate the importance of the cab. It is, after all, the interface between man and machine, and it has a huge bearing on the operator’s overall impression of the tractor hardware beneath. This profi cabin comparison assesses the ergonomics and comfort features on a selection of tractor models, and also attempts to highlight the major differences