First Class with Air Conditioned  
Day and Night Coach

1st class sleepers have lockable 2-berth compartments with washbasin and mirror and it is private cabins for singles or couples. Each private cabin has individually controlled air-con, There's a shower at the end of the corridor.  All beds use fresh cotton sheets, pillows with cases and laundered, sealed, towel-like blankets. Beds are set up by the train staff at around 9:00 pm and stored away again around 07:00 am. 
In both  1st and 2nd classes the beds are around 2m (6.5 ft) in length. The berths convert to a sofa for evening & morning use.  
Only common toilet is available (no private toilet). 
To own a private compartment of your own while travelling alone, then two first-class tickets must be purchased with discounts possible.
 First-class cars are available only on express and special express trains.
Number of rooms:  2 Rooms/2 persons each
Number of Sleeping Berths: 12 upper , 12 lower

Second Class
In a 2nd-class car,There are no compartments - berths are arranged open-plan either side of an aisle.  The two seats pull together to form the lower bunk.  The upper bunk folds out from the wall above the window.
In the a 2nd-class sleeper, you will find two rows of facing seat pairs; each pair is separated from the next by a dividing wall. A table folds down between each pair and at night seats convert into two fold-down berths, one over the other. Each bunk has curtains for privacy. and fresh linen are provided. A toilet is located at one end of the car and wash basins at the other. Second-class cars are found only on rapid and express trains; some routes offer air-con 2nd class as well as ordinary 2nd class.

 SPRINTER TRAIN in 2nd class:  
Sprinter Train - is a special Express train with air-conditioning and comfortable seats of reclining chairs, similar to that of the coach. There is no sleeping berth.
Fast, modern air-conditioned Anchor railcar with comfortable 2nd class reclining seats with hostess service of light meals and refreshments included in the fare.