2003 C320 MOST loop
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C320 2003
2003 C320 MOST loop
Hello, I apologize if this has been covered in another thread. Could someone post the items on the most loop? And the order they go in. I have the Bose audio system which recently stopped working. I just pulled my hu and confirmed there's a light coming from upstream which I believe is from the amp. Hu is also sending out a signal. I then looked at the cd changer which sends and receives. I have no idea what to check next as I can't find any documentation on what else is in the loop.thank you
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Joined: Dec 2003
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From: BC, Canada
2003 C230K Coupe Orion Blue
MY2002-2004 uses D2B, which is the predecessor to MOST.
The D2B ring goes Radio -> Sound System -> Voice Recognition -> Phone -> Tele Aid -> CD Changer -> Radio. I assume the Bose stuff (amp?) is represented by "Sound System".
There should be no reason to mess with the fibre optic ring at all, as it would be currently configured correctly.
Try pulling the Bose amp (or wherever the fibre lines plug into) fuse, or unplug the amp and see if you can "reboot" it. Simply shutting the car off won't work as the components will simply be put in sleep mode. Otherwise you're looking at a new amp if the current one is cooked.
The D2B ring goes Radio -> Sound System -> Voice Recognition -> Phone -> Tele Aid -> CD Changer -> Radio. I assume the Bose stuff (amp?) is represented by "Sound System".
There should be no reason to mess with the fibre optic ring at all, as it would be currently configured correctly.
Try pulling the Bose amp (or wherever the fibre lines plug into) fuse, or unplug the amp and see if you can "reboot" it. Simply shutting the car off won't work as the components will simply be put in sleep mode. Otherwise you're looking at a new amp if the current one is cooked.
Thread Starter
Newbie
Joined: Dec 2021
Posts: 7
Likes: 1
C320 2003
MY2002-2004 uses D2B, which is the predecessor to MOST.
The D2B ring goes Radio -> Sound System -> Voice Recognition -> Phone -> Tele Aid -> CD Changer -> Radio. I assume the Bose stuff (amp?) is represented by "Sound System".
There should be no reason to mess with the fibre optic ring at all, as it would be currently configured correctly.
Try pulling the Bose amp (or wherever the fibre lines plug into) fuse, or unplug the amp and see if you can "reboot" it. Simply shutting the car off won't work as the components will simply be put in sleep mode. Otherwise you're looking at a new amp if the current one is cooked.
The D2B ring goes Radio -> Sound System -> Voice Recognition -> Phone -> Tele Aid -> CD Changer -> Radio. I assume the Bose stuff (amp?) is represented by "Sound System".
There should be no reason to mess with the fibre optic ring at all, as it would be currently configured correctly.
Try pulling the Bose amp (or wherever the fibre lines plug into) fuse, or unplug the amp and see if you can "reboot" it. Simply shutting the car off won't work as the components will simply be put in sleep mode. Otherwise you're looking at a new amp if the current one is cooked.
MBWorld Fanatic!
Joined: Dec 2003
Posts: 3,275
Likes: 236
From: BC, Canada
2003 C230K Coupe Orion Blue
No worries, just continue the chat here. Might as well share the knowledge with the others. 
Anecdotally I've had components (usually the CD changer) occasionally stop working, but everyone else in the loop (such as the phone) would still work. I found that the changer was simply passing the data down the loop without responding. A power reboot of the component would fix the issue.
If you want to bypass the Bose amp, pick up a splice connector from the dealership for a few bucks. PN should be A000-545-33-84. Pretty sure you can find these online too.
Anecdotally I've had components (usually the CD changer) occasionally stop working, but everyone else in the loop (such as the phone) would still work. I found that the changer was simply passing the data down the loop without responding. A power reboot of the component would fix the issue.
If you want to bypass the Bose amp, pick up a splice connector from the dealership for a few bucks. PN should be A000-545-33-84. Pretty sure you can find these online too.
Thread Starter
Newbie
Joined: Dec 2021
Posts: 7
Likes: 1
C320 2003
No worries, just continue the chat here. Might as well share the knowledge with the others.
Anecdotally I've had components (usually the CD changer) occasionally stop working, but everyone else in the loop (such as the phone) would still work. I found that the changer was simply passing the data down the loop without responding. A power reboot of the component would fix the issue.
If you want to bypass the Bose amp, pick up a splice connector from the dealership for a few bucks. PN should be A000-545-33-84. Pretty sure you can find these online too.
Anecdotally I've had components (usually the CD changer) occasionally stop working, but everyone else in the loop (such as the phone) would still work. I found that the changer was simply passing the data down the loop without responding. A power reboot of the component would fix the issue.
If you want to bypass the Bose amp, pick up a splice connector from the dealership for a few bucks. PN should be A000-545-33-84. Pretty sure you can find these online too.
