SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Command system - no audio

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Old Feb 21, 2022 | 07:23 PM
  #1  
hydrogen's Avatar
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2005 SL500
Command system - no audio

Hi,

I have a 2005 SL500. Australian compliance.

Its happened a couple of times now the command system is working but no sound for the radio or the telephone connection.
The visual display is okay, just no audio.
Then later that day turn it on and working fine. A few days later no audio again.

Has anyone had that problem. Or knows the probably cause.

Thanks
Gerard.
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Old Feb 21, 2022 | 10:31 PM
  #2  
imtheking's Avatar
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Former R230, W220 and W221 owner
Originally Posted by hydrogen
Hi,

I have a 2005 SL500. Australian compliance.

Its happened a couple of times now the command system is working but no sound for the radio or the telephone connection.
The visual display is okay, just no audio.
Then later that day turn it on and working fine. A few days later no audio again.

Has anyone had that problem. Or knows the probably cause.

Thanks
Gerard.

When this happened to me, I disconnected the auxiliary battery in the trunk for 30 seconds and reconnected- audio started to work.

But for you it may be a bigger issue where a component is failing (audio gateway, cd changer, amp etc) and since the fiber network is all connected together, when one component fails, the whole system goes down (cd changer for example). You need to find which component is faulty

to troubleshoot you need a fiber optic bypass adapter


Amazon Amazon



and the instructions to troubleshoot are here:

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Old Feb 21, 2022 | 10:50 PM
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hydrogen's Avatar
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2005 SL500
Thanks mate.
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Old Feb 22, 2022 | 07:44 PM
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chad500sl's Avatar
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2017 SL550 (R231), 2021 E350 (W213)
Holding the power button on command for 10 seconds will cause it to reboot. This always fixes my audio issues, which happen randomly.
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Old Feb 22, 2022 | 08:07 PM
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hydrogen's Avatar
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2005 SL500
Ok, that’s simple and I can try that straight away.
thanks mate.
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