pre-installed in your vehicle by the car manufacturer will not give you enough options to make your music experience enjoyable. 
Some car manufacturers, depending on the type of car, will not provide cheap car CD receivers as a standard option and your only source could be the radio.Here are some options for what you should be looking for when you're ready to purchase a car CD player.
FM radio: The FM radio has been around for a very long time. Most car CD players will already have an FM radio installed. They will allow you to pre-set all of your favorite FM radio stations so you can easily switch from one to another with a press of a button.
HD Radio: Much like the newer HD channels for television, car CD receivers are also excepting HD radio station broadcasts. If you're looking for impressive clarity and static-free broadcasts from HD radio stations, you're going to have to find car CD receivers with built-in HD radio tuners.
Music CDs: One of the main reasons why almost every single person chooses to upgrade their factory radio without a CD player is to gain the ability to listen to their music CDs on the road.
MP3 and WMA CDs: MP3 and WMA are different formats of compressed music that you can record or "burn" onto a recordable CD. Almost all car CD players will play MP3 and WMA discs. This allows you to copy a decent amount of MP3 or WMA formatted music from your computer onto a recordable disc and play it through your system.
Flash memory storage devices: Some car CD receivers will be equipped with a front panel USB input. This will allow you to load a variety of music onto an additional thumb drive at which point you can plug it into the USB input and play it through your system.
MP3 players and other portable audio devices: More and more car CD players are featuring a front panel 3.5mm auxiliary input. With this feature, you will be able to directly plug your MP3 player or other portable audio device into your car CD player. This is a perfect and convenient way to add 1000s of songs to your arsenal.
Equalizers: If you like to tweak your music and set the acoustics of your tunes to your likings, look for car CD players with a good, built-in equalizer. If you're not about it, the standard bass and treble controls should work fine.
Preamp outputs: If you want to expand your system in the future and add additional amplifiers to your set-up, you will need a car CD receiver with preamp outputs. This allows you to easily connect the RCA cables from the amplifier to the CD player for system expansion.
Bluetooth: Not all car CD players are bluetooth capable. The best thing about bluetooth capable car CD players is hands-free calling. Some may also allow you to play the phone conversation through the speakers.Go back to Car Audio.
Or, learn more about:
Car Amplifiers
Car Speakers
Car Subwoofers
you first need to decide not only on what you want to listen to, but how you're going to listen to it. Many cheap car CD players provide you with various options when it comes to listening to music in your vehicle.
