Couchette cars are available in main line overnight trains of TCDD. They are called “ortulu kusetli” in Turkish.
Each compartment of couchette cars have 4 seats. During night, 4 beds replace seats.
Compartments are gender specific, unless reserved together.
Please note that here is not much space left for luggages.
Fare is TL 15 (€ 4) in addition to train fare (as of January 2018).
Trains with couchette cars are: