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Discussion Starter #1
I installed the puck bluetooth solution a few years ago and was very happy with the handsfree phone use in my E320 wagon. This year the microphone has stopped working, so I can hear the caller, but they cannot hear me. I tried re-seating the puck in the connector with no change in behavior, also re-synched the phone with the puck, but no joy.

I also noticed that the volume during playback of audio CDs will vary all over the place - loud, then soft, then loud again. Never did that before either.

Has anyone else run into this? 2004 model year with HK and Nav.
 

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Discussion Starter #3
Okay, thanks. I have spent some $ at the dealer and they couldn't figure it out.
 

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That is a somewhat common failure of the MB branded puck. The CD issue is not related, but could be a failing drive… but not likley. How much is the volume range oscillating and how often?
 
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