Most likely the IT guy thought you were either lying, or are too stupid to actually turn your computer off and on again. Because both is pretty typical for end users. Working in IT with direct contact to "non technical" end users will make you lose your faith in humanity very quickly, because you get to look straight into the deepest abyss of human malice and stupidity all day every day.
For trailers, there is a general speed limit of 80km/h, unless the trailer is suitably equipped and officially approved for 100km/h and is towed by a suitable vehicle. (Here, the specifics get complicated, because Germany) Trailers capable of driving at 100km/h must be marked at the rear with a sticker.
Ich kann Dir eine notariell beglaubigte, laminierte und unterschriebene Bestätigung des Ordnungsamts vorlegen, (in dreifacher Ausfertigung) dass ich zum Lachen vorschriftsgemäß in den Keller gehe.
Most likely the IT guy thought you were either lying, or are too stupid to actually turn your computer off and on again. Because both is pretty typical for end users. Working in IT with direct contact to "non technical" end users will make you lose your faith in humanity very quickly, because you get to look straight into the deepest abyss of human malice and stupidity all day every day.