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Help! No power to Audio 20/HeadUnit

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Old Jan 11, 2014 | 07:55 AM
  #1  
funkedelic's Avatar
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From: Alberta, Canada
2010 c300/2008 335i
Help! No power to Audio 20/HeadUnit

After jump starting my car, I turned off the power to the HeadUnit and then my Audio 20 never came back to life after that. When I push the On button I get no power or sound. My display screen won't turn on and the phone/voice command or any of those features aren't working either. When I check it through the instrument cluster , it just says AUDIO_ _ _ _.

I have tried holding down the button for a few seconds and nothing happens. I've checked any applicable fuses in the trunk and in the engine bay and they are all okay. I did some research and read some where about how to do a hard reset the Audio 20 but the person did not post instructions on how to do it.

I want to try doing this before taking anything apart and checking the fuse on the actual head Unit or taking it into Mercedes (Nearest one is 2 hours away)

If anyone has experienced this issue and has fixed it, PLEASE let me know. I'm going crazy driving around with no music. Also if you have any ideas or input on what I can try, it would be greatly appreciated! Thanks!

Last edited by funkedelic; Jan 11, 2014 at 07:20 PM.
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Old Jan 11, 2014 | 03:58 PM
  #2  
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Doa
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From: Belgium
W205
did or didn't you check the fuse?
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Old Jan 11, 2014 | 05:26 PM
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funkedelic's Avatar
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From: Alberta, Canada
2010 c300/2008 335i
Originally Posted by Doa
did or didn't you check the fuse?
I checked any fuses from 2 boxes that might have related to the audio 20 and they were all fine. I haven't taken out the actual HU out yet.
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Old Jan 11, 2014 | 10:03 PM
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funkedelic's Avatar
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From: Alberta, Canada
2010 c300/2008 335i
I took out the Head unit, the fuse in it was blown. Just had to replace the 10a fuse and it started right up! Just a bit of a pain to take out and put back together. Hopefully this helps anyone out that will have the same issue at one point or another.
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Old Feb 22, 2017 | 03:51 PM
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From: Hamilton, Ontario
2010 C300 Sport 4MATIC
Originally Posted by funkedelic
I took out the Head unit, the fuse in it was blown. Just had to replace the 10a fuse and it started right up! Just a bit of a pain to take out and put back together. Hopefully this helps anyone out that will have the same issue at one point or another.
Having this same issue and suspecting that fuse in the back of the unit is blown. However, the screen won't open so I can't remove the vent in order to to remove the unit How did you remove the vent? Is there a way to open the lid manually, I might just try shimming it until its open enough...
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Old Feb 22, 2017 | 04:21 PM
  #6  
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From: Regina SK
2008 C-230 4Matic Sport
Funkedelic, how did you boost the car? Did you hook up the cables per owners manual instructions?
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