antenna help

[91slamd325]

hey i just bought a 94 bmw 318is. the person before me put in a new cd player and now i cant get any radio stations. can someone tell me where the antenna is, i assume in the back window(not in the manual) and how i can fix this. should i take out the cd player and make sure the antenna is plugged in the back of it or what. any help is appreciated.

[328isRob]

Check the back of the head unit... there should be a black coaxal cable plugged into it that is the antenna.