Amann wants to find out what the system is really capable of. Earlier this morning he had put it to the test: he drove from the shores of Lake Constance all the way to and over the mountain pass on the Schiener Berg, at an altitude of over 700 metres, with the Predictive Powertrain Control system activated. Driving over a mountain pass using cruise control might seem a bit of a stretch, but Predictive Powertrain Control is much more than just a simple cruise control system. “As a precaution I set the cornering speed to minus five – because almost 27 tonnes of gravel do press very hard around tight corners. Even so, the Arocs was just cruising stoically up the mountain and through the forest. This really is as good as can be,” said Amann, a driver with 24 years’ experience. Whenever I think, ‘I would reduce speed about now’ the system kicks in – or sometimes it will let the Arocs roll on just a moment longer, which then results in a higher average speed, with lower consumption.