Mercedes Power-Shift: New automated, non-synchromesh manual transmission: The new Mercedes Power-Shift automated, non-synchromesh manual transmissions dispense with various mechanical elements – for example, synchronizer rings – that are required in synchromesh transmissions. Instead of this, the matching of gear ratios to engine speed at the output shaft and the gearwheel is performed by an intelligent engine, clutch and transmission control. The photo shows the 12-gear version of the direct drive transmission designed specially for long-distance haulage.