SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Voice Command & hands free calling microphone not working

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Old 06-19-2021, 02:45 PM
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2013 Sl550
Unhappy Voice Command & hands free calling microphone not working

I have a 2013 Sl550 ... all of a sudden no on can hear me on phone calls. I then realized voice command also not working. When I select the speak button on the stirring wheel, voice command comes up as it should, but its not hearing me and eventually "cancels". Is there a fuse that can be checked? I've already booted the command system to no avail.

Any ideas would be greatly appreciated. Thanks in advance!

Last edited by julrick001; 07-01-2021 at 11:21 AM.
Old 03-16-2022, 07:43 AM
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13 SL63, 07 SL550, 16 Escalade, 11 C70
I notice I have the same problem with a 2013 SL 63. Were you able to resolve the issue? Anybody else have an idea?

Thanks,
Old 03-16-2022, 01:35 PM
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SL 350 R231
Try removing the negative battery lead for 10/15 mins and see if that has re set it.
Old 03-16-2022, 10:05 PM
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Originally Posted by DCF
I notice I have the same problem with a 2013 SL 63. Were you able to resolve the issue? Anybody else have an idea?

Thanks,
Unfortunately, no. I've solved a number of issues from suggestions on this forum, but this one seems to not have been solved in the past by folks in the forum. I'll try the battery disconnect suggested by Bay Leaf, though I'm not optimistic that it will help as it's not a setting issue that needs to be reset per se. I'll post the results when done.
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Old 03-17-2022, 01:32 PM
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Yes give it a try my friend, you've nothing to loose .
Old 03-17-2022, 03:23 PM
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Does it matter which battery?
Old 03-19-2022, 10:17 PM
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Originally Posted by Bay Leaf
Yes give it a try my friend, you've nothing to loose .
Disconnected both batteries.... no luck.. ugh....
Old 03-22-2022, 01:30 PM
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Update on Microphone not working with voice command or phone:

Ran diagnostic in engineering menu. Both Microphone 1 and Microphone 2 show Fault: Microphone Circuit open error. Codes 94B7 and 94B8 (Mic 1 and 2) Still researching to determine next troubleshooting step. Can't seem to find fuse chart, or determine where voice/microphone control module is located.

Last edited by julrick001; 03-22-2022 at 01:34 PM.
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crconsulting (03-22-2022)
Old 03-22-2022, 01:37 PM
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2020 GLC300 -2013 Sl550 - 1997 SL600
Originally Posted by julrick001
Update on Microphone not working with voice command or phone:

Ran diagnostic in engineering menu. Both Microphone 1 and Microphone 2 show Fault: Microphone Circuit open error. Codes 94B7 and 94B8 (Mic 1 and 2) Still researching to determine next troubleshooting step. Can't seem to find fuse chart, or determine where voice/microphone control module is located.

Ever have any electrical work or interior work done on that car? Radar detector install, dash repairs, things like that.
(no fuse btw)
this issue may also be related:
https://mbworld.org/forums/e-class-w...y-hear-me.html
Attached Files
File Type: pdf
LI82.70-P-064726_Ver_5.pdf (45.1 KB, 113 views)

Last edited by crconsulting; 03-22-2022 at 01:52 PM.
Old 03-22-2022, 01:52 PM
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Originally Posted by crconsulting
Ever have any electrical work or interior work done on that car? Radar detector install, dash repairs, things like that.

this issue may also be related:
https://mbworld.org/forums/e-class-w...y-hear-me.html
No, I haven't had any electric work or work of any kind done on the car. Everything else on the car works flawlessly. Bought the car in 2020 with 9K miles on it... has 22K now. This is the only issue I've had with it.
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Old 03-22-2022, 01:55 PM
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2020 GLC300 -2013 Sl550 - 1997 SL600
Originally Posted by julrick001
No, I haven't had any electric work or work of any kind done on the car. Everything else on the car works flawlessly. Bought the car in 2020 with 9K miles on it... has 22K now. This is the only issue I've had with it.
Yeah, thats a bummer...
Have look at those links and attached XENTRY "tips".
Not much consolation.


Last edited by crconsulting; 03-22-2022 at 01:58 PM.
Old 03-22-2022, 04:47 PM
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2020 GLC300 -2013 Sl550 - 1997 SL600
Originally Posted by julrick001
Can't seem to find fuse chart
Forgot I had this. (don't pay attention to the car pictured. It's R231 part number)
I would look at the radio fuses just in case.
See attachment:
Attached Files
File Type: pdf
R231 FUSE .pdf (1.12 MB, 80 views)

Last edited by crconsulting; 03-22-2022 at 04:49 PM.
Old 06-17-2024, 04:51 PM
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R231
Originally Posted by julrick001
No, I haven't had any electric work or work of any kind done on the car. Everything else on the car works flawlessly. Bought the car in 2020 with 9K miles on it... has 22K now. This is the only issue I've had with it.
Hi! Ever get this sorted? Thank you
Old 06-17-2024, 05:28 PM
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Originally Posted by paw777
Hi! Ever get this sorted? Thank you
I took it to Mercedes and they reset the system and now works....so have no idea what was really wrong with it..... sorry....
Old 06-18-2024, 10:27 PM
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glc 200
Originally Posted by julrick001
Update on Microphone not working with voice command or phone:

Ran diagnostic in engineering menu. Both Microphone 1 and Microphone 2 show Fault: Microphone Circuit open error. Codes 94B7 and 94B8 (Mic 1 and 2) Still researching to determine next troubleshooting step. Can't seem to find fuse chart, or determine where voice/microphone control module is located.
module is under driver’s seat

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