9 Electronic components, including software for drive couplings with means of pressure and their parts, namely, electronic components, including software, included in this class; diagnostic systems and their components for land vehicles; measuring and control apparatus for electronically operated systems or installations operated by means of pressure and their components for land vehicles; sensors for measuring vehicle signals; electronic devices and processing units and evaluation of signals generated by sensors related to vehicles; pressure switches, solenoid valves and parts thereof; electronic control devices, including software and sensors; sensors for detecting wear on the wheel brake lining for land vehicles, in particular drum brakes, disc brakes and their parts, namely, sensors for detecting wear of the lining; valves operated by solenoid; distance sensors, software and electronic control units for control systems of the drive transmission with means of pressure for land vehicles and their parts, namely, distance sensors, software and electronic control units for them; electronic control apparatus and their corresponding software for earth-vehicle slowing devices, in particular engine (retardant) brakes; height sensors, electronic control devices and their corresponding software for air suspension apparatus and level adjustment equipment for land vehicles and their parts, namely, height sensors, electronic control devices and the software therefor, controls from distance; electronic control apparatus and corresponding software for control apparatus and valves for land vehicle shock absorbers, namely, electronic control apparatus and software therefor; electronic control apparatus and corresponding software for steering braking installations for land vehicles and their parts, namely, electronic control devices and the software therefor; control installations for land vehicles with pressure means and their parts, namely, electronic control equipment and software therefor; installations and their parts for the control of the stability of motion in land vehicles, namely, vehicle signal sensors, electronic control devices and the software therefor