12 Parts and mechanical assemblies of all types for the automobile industry, to the extent that they are contained in this class, namely, formed pieces and forged pieces, namely, motor vehicle parts of all types, namely, engines for motor vehicles, lightweight internal-combustion engines, units for the transmission line, namely, wheel hubs, wheel bearings, wheel bearing units, constant velocity joints, length adjustment units, shock absorbers for motor vehicles and their parts, longitudinal shafts, axle shafts and torsional shafts for motor vehicles and their parts, shafts, hubs, connections for longitudinal shafts, axle shafts and torsional shafts, vehicle transmissions and their parts, particularly shafts and gearwheels and units built-up thereof, step-up gears and step-down gears, synchronizing gears, shift dogs, internal step-up and step-down gears, differential gearings, hybrid drives, transmissions for electric drives, lightweight transmissions, low-cost transmissions and parts of the above-mentioned transmissions; engine and motor parts for motor vehicles, namely, hybrid drives, steering units and parts of the above-mentioned merchandise