What kind of adapter will i need to replace the original cd/stereo in my 97 bmw 318i?

i have a 1997 bmw 318i and i want to replace the stock business cd/tape/ stereo with an aftermarket cd player because of its mp3 feature. anyhow i would like to know what kind of adapter will i need to connect the new system and will i need an antenna adapter?What kind of adapter will i need to replace the original cd/stereo in my 97 bmw 318i?http://www.installer-parts.com/by_item.p鈥?/a>What kind of adapter will i need to replace the original cd/stereo in my 97 bmw 318i?go to best buy and tell them what you have and they will give you everything you need