The Becker in my 84 300D gets terrible reception all over Las Vegas. I have a Kenwood in my 81 240D that gets great reception everywhere and the car's antenna isn't even plugged into it. I think, depending on where you are, the Becker just won't be that great. I could be wrong though.

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1975 W115 240D
1981 W123 240D
1984 W123 300D
1996 W202 C220