Where are you allowed to park a trailer with a permissible total mass exceeding 2 t in built-up areas regularly on sundays and public holidays and between 10 p.m. and 6 a.m.?

You answered correctly. In Germany, trailers with a permissible total mass over 2 tons are subject to parking restrictions in built-up areas, especially on Sundays, public holidays, and between 10 p.m. and 6 a.m. Such trailers may only be parked regularly in industrial areas or, in wholly residential areas, on parking spaces that are specifically designated for trailers. Parking in recreational areas or on wide roads is not allowed unless it is a specially designated trailer parking spot. These rules help reduce noise and inconvenience for residents and ensure safety and accessibility in neighborhoods. Always look for clear signage indicating permitted trailer parking.