Um, sorry to be such a n00b. I searched about this but I think no one has ever asked this bc it's prob so simple. The question is in the picture

Please answer the following..

blue wire in pic goes to the blue wire of the d3's harness.

I have a MB ML350 with the AVIC-D3 installed. Since the installation I have fairly awful FM reception and no AM reception at all. The blue wire is connected to the blue and white wire on the AVIC, and in fact the installer showed the difference in signal when it was not connected. So I am confident that the connection is made.

My question is, does the D3 have a known issue for poor reception and what are the alternatives or workarounds? I have seen postings concerning antenna amplification, but I am not sure what product people are referring to.

Thanks

The D3's radio reception is outstanding. In fact Pioneer's "SupertunerIII" or whatever it's called, is one of the best on the market. Something isn't hooked up correctly and/or your antenna amplifier isn't getting power.

Some cars just don't work well with factory antennas and aftermarket radios. It could have to do with the antenna specifically tuned to the radio (somehow) or some other voodoo.

You may want to try a third party antenna, either one that goes in the dash, on the back window, or replaces your stock antenna, but other than connecting the wiring correctly, there's really nothing you can do to improve that situation with the stock antenna.