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

SL/R230: Command system - no audio

Old Feb 21, 2022 | 07:23 PM
  #1  
hydrogen's Avatar
Thread Starter
Member
 
Joined: Dec 2015
Posts: 104
Likes: 13
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.
Reply
Old Feb 21, 2022 | 10:31 PM
  #2  
imtheking's Avatar
Senior Member
15 Year Member
Liked
 
Joined: Apr 2007
Posts: 436
Likes: 79
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:

Reply
Old Feb 21, 2022 | 10:50 PM
  #3  
hydrogen's Avatar
Thread Starter
Member
 
Joined: Dec 2015
Posts: 104
Likes: 13
2005 SL500
Thanks mate.
Reply
Old Feb 22, 2022 | 07:44 PM
  #4  
chad500sl's Avatar
Member
5 Year Member
Community Favorite
 
Joined: Jan 2018
Posts: 129
Likes: 41
From: Florida
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.
Reply
Old Feb 22, 2022 | 08:07 PM
  #5  
hydrogen's Avatar
Thread Starter
Member
 
Joined: Dec 2015
Posts: 104
Likes: 13
2005 SL500
Ok, that’s simple and I can try that straight away.
thanks mate.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 10:07 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE