Diagnostic systems used to measure and monitor the operational status of functional systems in land vehicles, namely, diagnostic controllers comprised of a display unit, program cards, keyboard, sockets and connecting cables; measuring and control devices for electrical or compression operated systems and structural parts thereof for land vehicles used to measure the operational status of functional systems in land vehicles, namely, conformity test units comprised of display units, diagnostic interface units, voltage converters, cables and adapter plugs; electronic control units for the processing and the evaluation of signals generated by sensors which measure the operational status of functional systems in land vehicles; pressure operated switches; solenoid valves and components thereof; control systems and components thereof for heating, ventilating and air conditioning in land vehicles, namely, fan modules, pulse motors, DC motors, limit switches, temperature sensors, and operation consoles; electronic control apparatus comprised of software, sensors, anti-skid systems (ABS) and parts thereof, anti-slip systems (ASR) and parts thereof of land vehicles sold as a unit; control apparatus for land vehicle dampers, namely electronic control units and software sold as a unit; steering brake systems and components thereof for land vehicles, namely electronic control units and software sold as a unit; and control systems for compression operated clutches and components thereof for land vehicles, namely valves, electronic control units and software, sold as a unit

Pneumatically and hydraulically operated braking systems for land vehicles comprising compressors, pumps, air dryers, anti-freeze apparatus, reservoirs, pipes, fittings, valves, combined unloader, pressure regulators, circuit protection valves, relay valves, solenoid valves, way valves, control valves, brake cylinders, operating cylinders, coupling heads, slack adjusters, pipe fittings, Servo brake units comprised of a hydraulically controlled pneumatic control valve and a differential cylinder under pneumatic pressure which transmits force to the braking mechanism of land vehicles; Wheel brakes and components thereof, sold as a unit; Gear control systems and components thereof for land vehicles, namely working cylinders, valves, position measuring sensors, electronic control units and software, sold as a unit; Air suspension apparatus for land vehicles comprising air springs, height sensors, valves, electronic control units and remote control apparatus sold as a unit; Valves for land vehicle dampers; systems and components thereof for the control of the movement stability of land vehicles, namely sensors for vehicle signals, electronic control units and software, sold as a unit