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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

All speaker blown ?

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Old Nov 21, 2022 | 08:13 AM
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2011 GLK 220 CDI
All speaker blown ?
I'm just taken ownership to a 2009 W221 (pre-faceift). There are several smaller issues with the car, and one of them is the speaker system. I don't know if I have a Harman Kardon system. There are no indications on the speaker grills as I've seen on other S-classes.

The issue is that when I turn up tha bass with some volume, it sounds like all speakers are blown. How can I find if this is the situation, or is there a sub-woofer hidden some place that can cause this? Or the amplifier? Other toughts ?
Last edited by TerjeG; Nov 21, 2022 at 08:18 AM.
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Old Nov 21, 2022 | 10:46 AM
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'71 Pinto
Provide VIN.
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Old Nov 21, 2022 | 11:42 AM
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2011 GLK 220 CDI
VIN is WDD2210221A283482
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Old Nov 21, 2022 | 12:04 PM
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Not Harmon Kardon could be CU (amp) needs replacement for definitive diagnose have someone erase stored codes and do a quick test using Xentry (MB diagnostics).



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Old Nov 21, 2022 | 12:14 PM
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2011 GLK 220 CDI
Thanks a lot! I didn't know the diagnostic tool could help in such situations!
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Old Nov 21, 2022 | 12:27 PM
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depends on the tool autel $400 could do it in 2014 but snap on at $5000 still can't !!!!
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Old Nov 21, 2022 | 03:05 PM
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2011 GLK 220 CDI
I'll ask my local garage which has both Star diagnostic and som very expensive Bosh diagnostic tools.
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Old Nov 24, 2022 | 08:55 AM
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2011 GLK 220 CDI
I've now tried both Star diagnostic and Bosch, but the amplifier didn't show any error codes. Is it likely that all speakers have blown?

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