Testing apparatus for motor vehicles and land vehicles; brake testing apparatus; roller brake testers for motor vehicles and land vehicles; plate brake testers for motor vehicles and land vehicles; software; computer hardware and devices with a screen; stationary and mobile readers (data processing equipment); test benches consisting of testing apparatus for motor vehicles and land vehicles; wheel suspension testers for motor vehicles and land vehicles; side slip testers for motor vehicles and land vehicles; axle clearance detectors and play detectors for motor vehicles and land vehicles; wheel alignment devices for motor vehicles and land vehicles; caster testing machines for motor vehicles and land vehicles; velocity test stands for motor vehicles and land vehicles; source function test benches and performance test benches for motor vehicles and land vehicles; power take-off shaft function testers and power take-off shaft performance testers for motor vehicles and land vehicles; exhaust emissions analysis testers for motor vehicles and land vehicles; exhaust gas measurement apparatus; headlight testing apparatus for motor vehicles and land vehicles; tyre testing apparatus for motor vehicles and land vehicles; speedometer test stands for motor vehicles and land vehicles; tachograph test stands for motor vehicles and land vehicles; speed limiter testing apparatus; deceleration measuring apparatus; closing force measuring apparatus; sound level meters