E-Class (W211) 2003-2009

Ideas? Poor voice quality w/MB factory phone kit

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Old Jul 17, 2008 | 01:20 PM
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Question Ideas? Poor voice quality w/MB factory phone kit

I have a factory bluetooth puck with voice recognition retro fitted in my 05 e320. Everything works great, except everyone I call says that my voice sounds like I'm talking through a heavy folded blanket.

When I put my face a few inches away from the factory mic, people on the other end say it sounds better, but still very muffled.

The system was retrofitted by MBenzNL when Steve was in town recently. It's the complete kit except for the Linear Compensator.

2 questions:

1) Is this normal for phone MB systems installed by the factory?
2) Can the attenuation of the mic be turned up?

Thank you!

-David

Last edited by dw8083; Jul 17, 2008 at 01:22 PM.
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Old Jul 17, 2008 | 02:16 PM
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Originally Posted by dw8083
I have a factory bluetooth puck with voice recognition retro fitted in my 05 e320. Everything works great, except everyone I call says that my voice sounds like I'm talking through a heavy folded blanket.

When I put my face a few inches away from the factory mic, people on the other end say it sounds better, but still very muffled.

The system was retrofitted by MBenzNL when Steve was in town recently. It's the complete kit except for the Linear Compensator.

2 questions:

1) Is this normal for phone MB systems installed by the factory?
2) Can the attenuation of the mic be turned up?

Thank you!

-David
Which BT puck part number are you using? Did you get that from Steve too?

I believe the early US BT adapters had problems like this. I believe AWS also had instructions on setting the microphone volume up/down but this did not work for Euro devices and I don't remember the necessary button sequence.

Which phone are you using, another phone could make a difference too.
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Old Jul 17, 2008 | 02:33 PM
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Originally Posted by Diesel Benz
Which BT puck part number are you using? Did you get that from Steve too?

I believe the early US BT adapters had problems like this. I believe AWS also had instructions on setting the microphone volume up/down but this did not work for Euro devices and I don't remember the necessary button sequence.

Which phone are you using, another phone could make a difference too.
I bought the whole setup from Steve and he did a great job with the installation.

I just discovered the 0000#1# code to turn up the mic volume by dialing that number a dozen times. On the receiving end the my voice is now clearer, but still muffled. My test was with the car parked and no AC to avoid any background noise.

The BT device B6 787 5877. It has a set of code #'s; HW:1906 and SW:5106.

My phone is an iPhone. The iPhone's volume is set to maximum. The whole system works terrific, just the mic attuentation is low, even after the using the 0000#1# code about 10 times.

Thank you, your insights are really appreciated!

-David
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Old Jul 17, 2008 | 07:37 PM
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The sound on the receiving end of the call is fuzzy and muffled. I cannot believe I spent $1900 bucks on this including the voice recognition.

MB should be embarrassed. Somehow I cannot believe they shipped who knows how many e-classes with a phone system that sounds like this.

It's down right irrating for the poor person on the receiving end to have to listen too.

I test drove a new C300 and the phone sounded great for a couple of people who have heard my e320 system.

I'm still hopeful there's a configuration error or update that will fix it.

-David

Last edited by dw8083; Jul 17, 2008 at 07:45 PM.
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Old Jul 17, 2008 | 11:29 PM
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Just a shot in the dark, but have you checked the mic's covers to see if it maybe dirty or covered or something like that? I have a similar setup, but using the BMW puck, and everybody I call tell me that it sounds great.
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Old Jul 18, 2008 | 12:15 AM
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Originally Posted by dw8083
The sound on the receiving end of the call is fuzzy and muffled. I cannot believe I spent $1900 bucks on this including the voice recognition.

MB should be embarrassed. Somehow I cannot believe they shipped who knows how many e-classes with a phone system that sounds like this.

It's down right irrating for the poor person on the receiving end to have to listen too.

I test drove a new C300 and the phone sounded great for a couple of people who have heard my e320 system.

I'm still hopeful there's a configuration error or update that will fix it.

-David
The MHI control unit (microphone) software may need to be updated to current version with SDS. You can mention DTB P-B-82.70/492 MAR06 as a reference.
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Old Jul 18, 2008 | 01:38 AM
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Originally Posted by konigstiger
The MHI control unit (microphone) software may need to be updated to current version with SDS. You can mention DTB P-B-82.70/492 MAR06 as a reference.
Thanks for the idea. I'm heading to the stealership Friday to check the control unit software.

-David
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Old Jul 18, 2008 | 03:51 AM
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The phone itswelf might have a crappy BT transfer.Did you try to pair another phone?
I tried samsung,a few motorolas and siemens and siemens is far the best of all.
Good luck!
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Old Jul 18, 2008 | 12:44 PM
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Hey, I've got the same problem with the puck. Is it the ugly one that doesn't look like an SLR engine? Just a black motorola thing with a blue light? Yea, well thats what I got and people tell me I sound like I'm in a fish bowl talking through a water microphone. Windows up, no A.C. people are still like what the hell are you talking about? Idk whats wrong, but I've come to deal with it. Maybe I'm stupid to let it go but I spent nearly a grand on components and had it installed at the dealership and it still sounds like crap. Idk what else to do. Worse than that, I have a Motorola Razr, so naturally the bluetooth puck and the phone are the same make and therefore should work great together, but no matter what I do, it always sounds the same. Good luck!
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Old Jul 18, 2008 | 02:40 PM
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Thank you for everyome's help so far.

I just returned from the dealership and they are puzzled.

1) They hooked up the car to SDS and the software seems current.
2) The service advisor paired his own phone and the problem persisted.
3) They had never seen the puck I bought from Steve B6 787 5877 (pic attached). They tried the puck they sell B6 787 5878 (the one that looks like an SLR engine), and could only hear one side of the conversation - the person outside the car.

BTW, the Bluetooth signal strength shows 5 bars on the lower right side on the COMMAND screen. The dealership wants the car for about 4 hours to try and diagnose the issue. Ouch, cost wise!

Any thoughts would be appreciated.

-David
Attached Thumbnails Ideas? Poor voice quality w/MB factory phone kit-b6-787-5877.jpg  

Last edited by dw8083; Jul 18, 2008 at 02:48 PM.
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Old Jul 18, 2008 | 03:31 PM
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Originally Posted by dw8083
Thank you for everyome's help so far.

I just returned from the dealership and they are puzzled.

1) They hooked up the car to SDS and the software seems current.
2) The service advisor paired his own phone and the problem persisted.
3) They had never seen the puck I bought from Steve B6 787 5877 (pic attached). They tried the puck they sell B6 787 5878 (the one that looks like an SLR engine), and could only hear one side of the conversation - the person outside the car.

BTW, the Bluetooth signal strength shows 5 bars on the lower right side on the COMMAND screen. The dealership wants the car for about 4 hours to try and diagnose the issue. Ouch, cost wise!

Any thoughts would be appreciated.

-David
That is the Euro BT HF profile puck. I wonder if your car actually has the Euro UHI (or is it these days the same as the US MHI)? I still don't see why the audio would be distorted. Have you tried another BT puck?

Shouldn't you ask Steve before letting your dealer look at the car. If it has Euro parts, they might through those away and put US parts in, for nothing.

Last edited by Diesel Benz; Jul 18, 2008 at 03:34 PM.
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Old Jul 18, 2008 | 03:41 PM
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Originally Posted by Diesel Benz
That is the Euro BT HF profile puck. I wonder if your car actually has the Euro UHI (or is it these days the same as the US MHI)? I still don't see why the audio would be distorted. Have you tried another BT puck?

Shouldn't you ask Steve before letting your dealer look at the car. If it has Euro parts, they might through those away and put US parts in, for nothing.
I contacted Steve and ironically he called me from his hardwired Nokia phone using the hands free system and his voice was just as distorted. The dealer could only get one side of the conservation using the BT model they sell.

I email Steve this morning to see if he could comment on this thread as well with any thoughts he might have.

-David
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Old Jul 18, 2008 | 06:35 PM
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Originally Posted by Diesel Benz
Shouldn't you ask Steve before letting your dealer look at the car.
...that is what I would have done as well...

the older 211s have a microphone array with 4 mics at the bottom of the mirror - mercedes changed that in 2007 for microphone arrays with only 2 mics at the top of the mirror...one of the reasons for that change was what is described here.

The installed MHI module (US spec) is new and so was the BT cradle...the small black BT cradle is the same as the SLR looking one...same internals - different housing (US= SLR, europe= black) and same pairing code.

Just mail me and we will set something up rather then wasting money at a dealership (we DO offer aftersales service).

greetingz,
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Old Jul 18, 2008 | 06:52 PM
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Originally Posted by MBenzNL
the older 211s have a microphone array with 4 mics at the bottom of the mirror - mercedes changed that in 2007 for microphone arrays with only 2 mics at the top of the mirror...one of the reasons for that change was what is described here.
Should this not have been caught by the dealer when checking the MHI via DAS path as I suggested?
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Old Jul 18, 2008 | 06:53 PM
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Thanks Steve! I sent you an email. -David
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Old Dec 8, 2009 | 05:28 PM
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I have a similar problem with my bluetooth, people complain it is very hard to hear m

I was curious if you found a solution to the low audio. I recently has dealer install voice recognition and all components for bluetooth puck. I have a 2006 S500 4Matic. I spent a fortune to MB dealer to install. They do not have an idea of what's wrong.
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Old Dec 8, 2009 | 06:12 PM
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My Lexus had bluetooth and people would always complain they couldn't hear me. I never bothered to get it on the Mercedes for that reason.
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Old Apr 6, 2012 | 05:46 PM
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Originally Posted by dw8083
I just discovered the 0000#1# code to turn up the mic volume by dialing that number a dozen times. On the receiving end the my voice is now clearer, but still muffled. My test was with the car parked and no AC to avoid any background noise.
Wow. Thanks for saving me so much hassel & frustation. Finally did this and it made a huge difference. Now I'm not embarrassed to pickup customer calls when I'm on the road. It was like I was stuck in Sprint PCS ages circa 2000. "Can you hear me now"!?
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