2014 E350 No Audio
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Joined: Aug 2019
Posts: 595
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From: USA to Germany
W221/W222/W213/X290
2014 E350 No Audio
I know i've made a thread previously for this but I thought I'd make a new one to clear somethings up.
My audio cut out while I was driving on the highway. Music was playing and out of no where the sound cut out. The below is what i have checked and replaced:
- AMP
- Fuses
- Relays
- Cleaned off the fiber connections on the COMAND head unit and every other Fiber end I could find (In the trunk also)
- Did a hard and soft reset of the COMAND unit.
- With STAR computer, did a hard rest of the COMAND unit as well.
Sound for the emergency SOS calling works. I hear sound come out of the speakers and it rings, but no sound through FM, AM, Bluetooth, AUX, etc.
I was literally going to trade in the car because I am out of options here. Only other thing left to replace would be the main battery and AUX battery. My Start/Stop feature doesn't seem to be working and the other day my car would not turn on because the battery was fully drained. Could this be the problem? I had a ESP light as well but that was because of the battery, so i am wondering if the battery could have anything to do with the sound?
I took the car to a local Mercedes dealership to look into it, but of course like 90% of the Mercedes dealerships they'd rather steal your hard earned $160 for the hour than to actually tell you what's wrong. They said that their computer "cannot communicate with the COMAND head unit". I find that either to be a Fiber cable is bad or maybe something with the battery causing components not to work properly? the dealership said they "need another $500 to diagnose the issue and take apart the front panels and trim".
My audio cut out while I was driving on the highway. Music was playing and out of no where the sound cut out. The below is what i have checked and replaced:
- AMP
- Fuses
- Relays
- Cleaned off the fiber connections on the COMAND head unit and every other Fiber end I could find (In the trunk also)
- Did a hard and soft reset of the COMAND unit.
- With STAR computer, did a hard rest of the COMAND unit as well.
Sound for the emergency SOS calling works. I hear sound come out of the speakers and it rings, but no sound through FM, AM, Bluetooth, AUX, etc.
I was literally going to trade in the car because I am out of options here. Only other thing left to replace would be the main battery and AUX battery. My Start/Stop feature doesn't seem to be working and the other day my car would not turn on because the battery was fully drained. Could this be the problem? I had a ESP light as well but that was because of the battery, so i am wondering if the battery could have anything to do with the sound?
I took the car to a local Mercedes dealership to look into it, but of course like 90% of the Mercedes dealerships they'd rather steal your hard earned $160 for the hour than to actually tell you what's wrong. They said that their computer "cannot communicate with the COMAND head unit". I find that either to be a Fiber cable is bad or maybe something with the battery causing components not to work properly? the dealership said they "need another $500 to diagnose the issue and take apart the front panels and trim".
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From: Toronto & California
2015 ML400 4MATIC, 2016 C300 4MATIC, 2014 E350 4MATIC (Totaled), 2006 E350 (Sold)
You may need to go into engineering mode and view the amp settings. there’s a setting for external amp and internal amp. Check to see if External Amp is selected. It should be selected.
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Super Member
Joined: Aug 2019
Posts: 595
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From: USA to Germany
W221/W222/W213/X290
Yes, I've done that as well. Diagnostics show that the AMP is "NG". Not sure what that means but I guess there is no communication somewhere. I believe that the AMP is good.
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Super Member
Joined: Aug 2019
Posts: 595
Likes: 171
From: USA to Germany
W221/W222/W213/X290
I could be wrong, but it still shoots out Fiber light when I un plug the connector. I am taking it to a shop this weekend to have them look into the optical loop and the individual sound devices.
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Joined: Aug 2019
Posts: 595
Likes: 171
From: USA to Germany
W221/W222/W213/X290
I really should have done that. However, now that MB of Manchester NH broke my head unit after trying to fix it, I have to figure out what exactly is happening. I believe there could be a bad AMP or optical ring gone bad somewhere. I am bringing it to a shop here in Manchester NH that works with Porsches and Lamborghinis (other high end cars too) and they have the computers for it,
