I hope you are asking me as you may not have you manual with you
there is a list of things the service provider will change.
engine oil
coolant
gear oil
transmission oil
check all the filters
and check for leaks
this is what is done and in checking if anything has to be changed they will inform you.
before taking this anywhere go to Rashidya Opposite Festival City there are good garages in a line and will see the problem. dont delay and dont experiment.