Downloadable software application for a mobile device comprising video display panels, video cameras, and electronic controllers incorporated into motor land vehicles, for managing the attachment of the vehicles to trailers, for providing trailering system testing and diagnostics, and for automatically adjusting the transmission and brake systems of the vehicles and trailers

'adjust':41 'applic':3 'attach':25 'automat':40 'brake':45 'camera':13 'compris':8 'control':16 'devic':7 'diagnost':37 'display':10 'download':1 'electron':15 'incorpor':17 'land':20 'manag':23 'mobil':6 'motor':19 'panel':11 'provid':32 'softwar':2 'system':34,46 'test':35 'trailer':30,33,51 'transmiss':43 'vehicl':21,28,49 'video':9,12

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