I have a 2000 s40 volvo and I want to replace the radio What radio can i buy from bestbuy?

The radio works however the cd player keeps ejecting the cd. So I want to replace the radio Can I also buy the radio from bestbuy and have the Volvo dealer replace the radio? Or is it easier to do it on my own and where can i get the proper steps to replace the radio? This is my first car! I really need help!|||Anyone you like and can afford. but the trick is to buy an installation kit so all you have to do is plug and play. that way you wont have to cut opr splice any wires or mess up your car trying to install it. they also comes with new faceplate to fit and look factory