No Sound Need help troubleshooting
Thread Starter
Member
Joined: Jan 2012
Posts: 215
Likes: 9
From: Charlotte, NC
2005 C55 AMG
No Sound Need help troubleshooting
Posted this in the Audio forum thought I would try here also.
Trying to fix the CD Changer I managed to get it working to then tearing the connector ribbon on the back of it, no more CD Change. The sound quit working after this, everything works, radio comes on, Single CD in the Head Unit loads, Nav works but NO SOUND. I checked all the fuses related to the radio, COMMAND and Nav system. This was all with the CD Changer still plugged in, I unplugged it and Still nothing. Anyone have any ideas?
Trying to fix the CD Changer I managed to get it working to then tearing the connector ribbon on the back of it, no more CD Change. The sound quit working after this, everything works, radio comes on, Single CD in the Head Unit loads, Nav works but NO SOUND. I checked all the fuses related to the radio, COMMAND and Nav system. This was all with the CD Changer still plugged in, I unplugged it and Still nothing. Anyone have any ideas?
Newbie
Joined: Nov 2013
Posts: 14
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From: Iowa moving to Michigan
C55 amg
I believe the cd changer, amplifier and headunit's fiber optic run in a loop connecting all three. If one doesn't work then it is possible that the other doesn't work. I would guess that you will need to get the cd changer to work again for the amp to work. I am currently installing a new head unit and ampifier to get rid of the fiber optic problems.
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Joined: Mar 2004
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
The audio equipment does run in a loop using fiber optic cables. On the C55 this is known as the MOST ring. You most likely disrupted it. The fiber optic cables are orange. Be very careful with them and don't kink it. Do you have power to the CD unit?
MBWorld Fanatic!
Joined: Mar 2004
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
That is why I think the easiest thing to do maybe to just make the CD pass thru the fiber optic signal properly.
Thread Starter
Member
Joined: Jan 2012
Posts: 215
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From: Charlotte, NC
2005 C55 AMG
Yes the HU is working, the Navigation works just no sound. The Single CD behind the HU faceplate works also no sound.
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MBWorld Fanatic!
Joined: Mar 2004
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From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
I was referring to power to the CD changer. Do you have a picture of the connector ribbon that is broken? If I have free time at the end of the day, I'll look through my MB WIS documentation to see what i can find.
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MBWorld Fanatic!
Joined: Mar 2004
Posts: 2,073
Likes: 27
From: North NJ
2002 C32 AMG, 2013 GLK 350/4, 2015 E63S AMG Wagon
Not sure what you did to make the sound go away but here is some more info. I see the ribbon cable and there can be a number of issues. It looks like you will not need any version coding to remove the CD hanger. Only to add a changer. That's good news. Regarding the fiber optic cables, you need to complete the fiber loop. On the older cars with the D2B loop, this is done using a coupler part 000 545 33 84. I don't know what it would be for the MOST loop which is what you have. Sometimes the CD cable is constructed in the way that it can be coupled bypassing the CD unit. I again had seen it on the older W203s with D2B loop.
Thread Starter
Member
Joined: Jan 2012
Posts: 215
Likes: 9
From: Charlotte, NC
2005 C55 AMG
Not sure what you did to make the sound go away but here is some more info. I see the ribbon cable and there can be a number of issues. It looks like you will not need any version coding to remove the CD hanger. Only to add a changer. That's good news. Regarding the fiber optic cables, you need to complete the fiber loop. On the older cars with the D2B loop, this is done using a coupler part 000 545 33 84. I don't know what it would be for the MOST loop which is what you have. Sometimes the CD cable is constructed in the way that it can be coupled bypassing the CD unit. I again had seen it on the older W203s with D2B loop.
Thanks for your help. Now I have to either get mine fixed, find a replacement or find a MOST coupler. I found someone to fix mine (pricey), someone is checking to see if they have an old one (no luck on ebay), and I have no idea about the MOST coupler. LOL I would like to get the coupler out of all of these because I've decided to try and embrace more modern technology and use the MP3 adapter. But I can't until I get the SOUND back.
Thread Starter
Member
Joined: Jan 2012
Posts: 215
Likes: 9
From: Charlotte, NC
2005 C55 AMG
Replaced the CD changer with a working unit. Everything is functioning again. When the MOST fiber optic loop connector arrives I will take out the CD changer and install the Loop connector to see if that also works.
Thread Starter
Member
Joined: Jan 2012
Posts: 215
Likes: 9
From: Charlotte, NC
2005 C55 AMG
Ok, I unhooked the CD Changer and plugged in the MOST Optic Loop connector. It worked I had sound. So at least I know if the CD Changer goes bad again or acts up I can still have sound.
