I bought this car in 2005 since then I haven't bring it on any AC service centre but this summer I am feeling it's not working well all I need to confirm which service provider have good repute meanwhile I also tried on my behalf but there is a conflict someone simply ask me that your car AC need just a service but when I went on a AC service centre they claim it need to discharge the gas also then it will be healthy to have AC service otherwise keep using so guide is it really needed to discharge the gas or just service it needed.