Along with Caterpillar’s recent changes to its European distribution – Claas now sells tracked Cat Challengers on this side of the Atlantic – the US machinery giant has also updated its 300hp+ crawlers and tagged them E-series. Big brothers to the popular 35, 45 and 55 models (156kW/212hp to 199kW/270hp), we drive the new E series’ mid-ranger, the 254kW/340hp 75 E