12 Couplings for motor vehicles, including motor vehicle couplings using liquid media for torque transmission; parts for motor vehicle couplings, namely housings, discs and plates; locking motor vehicle differentials, locking motor vehicle differentials that include fluid couplings; parts of motor vehicle locking differentials, namely housings, gears, bearings, couplings and brakes; electromechanical, hydraulic and pneumatic control mechanisms for use with motor vehicles, electromechanical, hydraulic and pneumatic control mechanisms for actuating motor vehicle couplings and motor vehicle locking differentials; parts of control mechanisms for motor vehicles, namely electric motors, reduction gears, ramp-type discs, bearings, vibration dampers; axle drives; motor vehicle axle drives having integrated couplings, locking differentials and control mechanisms; and motor vehicle transfer gearboxes