On a European passenger train, a wagon-lit is this type of car
[DOC] [TLE] Sleeping car - Wikipedia [PAR] The sleeping car or sleeper (often wagon-lit) is a railway passenger car that can 
accommodate all its passengers in beds of one kind or another, .... An example of 
a more basic type of sleeping car is the European couchette car, which is divided
... [DOC] [TLE] Passenger car (rail) - Wikipedia [PAR] A passenger car is a piece of railway rolling stock that is designed to carry 
passengers.