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S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

2013 W221 no sound from radio

     
Old Nov 10, 2025 | 02:51 PM
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2013 W221 no sound from radio
2013 W221 no sound from the radio
somebody tell me something what's first to check?
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Old Nov 10, 2025 | 03:22 PM
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2011 S550 4matic
Common problem is the amp but I think you really need xentry diagnostic scan
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Old Nov 10, 2025 | 09:10 PM
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First, check if the sound is gone for all sources like radio, CD, and Bluetooth. If it's completely silent, the most common cause is a failed amplifier in the trunk. Check for water damage on the amp or a blown fuse. A faulty MOST fiber optic loop can also kill all audio.
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Old Nov 13, 2025 | 12:41 PM
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2011 S550 4matic
Alexie is right, sound is transferred via MOST fiber optic cables, sometimes that can be a problem, I believe there's a bypass cable available on Amazon for testing this
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Old Nov 13, 2025 | 02:02 PM
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two posts in two days - where no one bothered to look for the same issues posted within 24hrs of each other

https://mbworld.org/forums/s-class-w...ml#post9233753
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