Ya look and see if the wire is connected. Was it an automatic antenna or switched from dash? There should be constant power back to it and blue wire is switched for auto antenna. The switch one turn it on and check for power. Once you do that get back with us. I know how to test the switch on the auto antenna if the switch power box is bad. Is it a used or new antenna? If its new take it back get another.
Is it a mercedes benz radio? if not youll have to have them check. Probably a loose connection. The becker radios dont play nice with regular new style radios The car is no ground to head unit to speakers. Just like the fader on the console shouldnt work if you have an aftermarket stereo. If someone did work have them fix it quick before they say your out of luck.
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