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I just upgraded my non-COMAND 2007 CLK W209 Cabriolet with a Pioneer AVIC-Z130BT double-din navigation unit.

In general, I love it. Great navigation interface, built-in traffic, voice control, Pandora from my iPhone over Bluetooth, etc etc.

Strangely, however, the only thing that has gotten markedly worse after the upgrade is AM/FM radio reception. This is still pretty important to me. Reception was probably a "D" when I got it back from the installer. I called and brought it back in and they moved the antenna or something and now it's maybe a C+ on a good day and a C- on a bad day. Not exactly listenable.

The installer said the car has 5 antennas... all embedded in the glass, and aftermarket radios don't have access to them. Is this true? If so, is there anything else I can do to improve the situation? Is there some kickass aftermarket antenna I need to buy or something?

Thanks.
 

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Coupe/Convertible Forums Moderator
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You need to connect the radio's power antenna output to the antenna lead on the wiring harness in order to supply power to vehicle's antenna amplifier.
 
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