I did this on ours - I reduced microphone sensitivity Channel 131 because it was hard to hear the person talking from it like it was distorted. By reducing the sensitivity it really helped making it clearer. Here's how you do it using Vag-Com.

Setup the telephone controller to function as per the settings chosen.
Telephone – Controller 77
The controller soft coding should be set to 0000422
0?xxxx: Motor Vechicle Type
0 – CANBUS
1 – D3/C6 High System
2 – C6 Standard System
0x?xxx: Steering Wheel Type
0 – non multifunction steering wheel
1 – standard steering wheel
2 – modular steering wheel
0xx?xx: Installed Components
1 – none
2 – Multi Function Steering Wheel
3 - Head Unit
4 - Multi Function Steering Wheel and Head Unit
5 – K-line
6 - Multi Function Steering Wheel and K-line
7 – Head Unit and K-line
8 - Multi Function Steering Wheel, Head Unit and K-line
0xxx?x: Language Spoken by Unit
0 – Language operation out
1 – German
2 – English (UK)
3 – French
4 – Italian
5 – Spanish
6 – Not Used
7 – English (US)
8 – Language operation of external equipment (RNS 510 etc)
9 – Speaker dependent language choice
0xxxx?: Language for MFD (Multi Function Display)
0 – no announcement in the MFD
1 – German
2 – English (UK)
3 – French
4 – Italian
5 – Spanish
6 – Not used
7 – English (US)
Now move onto channel adaption, the following channels should be adapted with the default values listed, information on these values is available further down the page.
channel 128 (base volume) - 0
channel 129 (disconnection delay)- 6
channel 130 (offset delay) – 2
channel 131 (mircrophone sensitivity) – 130
channel 132 (unknown) – 0
channel 133 (bluetooth on/off) – 1
channel 134 (speech on/off) – 0
channel 135 (bluetooth passkey)- 1234
channel 136 (offset delay) – 9
channel 137 (unknown) – 1
channel 139 (unknown) – 0
Channel 128 – Base volume (Base volume of the output)
000 – 0dB (no increase/decrease)
001 – +1dB increase
002 – +2dB increase
003 – +3dB increase
004 – +4dB increase
005 – +5dB increase
006 – +6dB increase
128 – -1dB decrease
129 – -2dB decrease
130 – -3dB decrease
131 – -4dB decrease
132 – -5dB decrease
133 – -6dB decrease
Channel 129 – Disconnection Delay (Disconnection delay after turning ignition off)
000 – 30 seconds
001 – 5 minutes
002 – 10 minutes
240 – 20 hours
Channel 130 – Offset Delay (Offset compenstion delay to avoid echoes)
0 – 0ms
1 – 1ms
2 – 2ms
….
11 – 11ms
12 – 12ms
Channel 131 – Microphone Sensitivity (Lower/Raise the Microphones Sensitivity)
000 – 0dB (no increase/decrease)
001 – +1dB increase
002 – +2dB increase
003 – +3dB increase
004 – +4dB increase
005 – +5dB increase
006 – +6dB increase
128 – -1dB decrease
129 – -2dB decrease
130 – -3dB decrease
131 – -4dB decrease
132 – -5dB decrease
133 – -6dB decrease
Channel 132 – unknown
0 – default
Channel 133 – Bluetooth (Bluetooth activate/deactivate)
0 – Disable
1 – Enable
Channel 134 – Speech Function (Speech control On-Off)
0 – On with fixed mobile phone and bluetooth
1 – Off with fixed mobile phone and not bluetooth
Channel 135 – Bluetooth Passkey (4 Digital Passkey to allow access to the bluetooth)
1234 – Default passkey
Channel 136 – Offset Delay (Offset compensation delay between transmit and receive)
001 – 0.1 seconds
002 – 0.2 seconds
003 – 0.3 seconds
004 – 0.4 seconds
…..
024 – 2.4 seconds
025 – 2.5 seconds
Channel 137 – unknown
1 – default
Channel 139 – unknown
0 – default

 

I need this done also my bluetooth is horrible everyone complains the can't hear me and i hear then just fine. It has been this way since new and everytime I have complained about it to dealer they said it test fine. It is so useless i dread using the phone. I will pay someone with a VAGCOM for results. Long Island New York Area.

 

My wife drives the Treg and when she called me from it - it sounded distorted - like she was talking too loud into the mic. So I reduced the sensitivity and it helped considerably.

 

Does anyone know where i can get this done?? Dealer looks at me like I have three heads when I mention this problem!!!

 

Find a boardmember with a vag-com.

 

shamuscull, any luck? I am in NY and need this doe too I think. Joe

 

I am the only guy in my circle of friends with a VW I also have an Audi maybe I should buy that thing

 

The VagCom will more than pay for itself if you own an Audi and or VW. It's worth every penny.

 

Hi I finally got my buddy with a VAG to take a look, but cant find Controller 77. I have a 2012 TDI, any tips would be great, thanks!

 

Check through the list of controllers - should list telephone under one of them. With the MMI system - i'm sure it's there but just in a different location.

 

Mic Gain

OK Thanks! I will take a look.

Joe

 

OK Thanks! I will take a look.

Joe

did you ever figure this out? I dug around mine and think it might be in the Green Menu but have no idea what to adjust in there.

 

Nope, even got a new 2012 CAN adapter. Really a PIA. If anybody has any ideas, let us know!

 

My VAG-com lists the controller for the telephone in the menu........are you sure that you have an updated version of the software?

if not, just do an auto update.

If so.......

 

Right, we see it, but no dice.

 

Dig around other controllers that might be related - sometimes the modules are in other locations. It has to be there somewhere.

 

I find that when I call my wife in the Touareg that her voice is distorted like she is in an airplane. Would adjusting the sensitivity help this? I had turn off the A/C while speaking to me it helped a little bit but did not resolve the issue and the last thing I want her to do is turn off the A/C everytime someone calls her in the Tourareg. Any ideas?

 

It will help but my permanent fix was stuffing foam around the microphone on the inside portion of the headliner where it is located. I also blocked off all the holes in that area. THAT finally solved our bluetooth problem. It seems that wind noise from the buffeting of the roof is being picked up by the back of the microphone.

 

Where is the location of the microphone?

 

Mic is located on the outside of the home link buttons. Those two grates are where they reside

 

Is there a special way on how to remove that home link case without damaging it? I don't see any screws or fasteners?

 

I used a small flatblade screwdriver - pried one side up and it just popped out.

 

tried to adjust the mic in my Touareg, well 011 don't have module 77 , I found it in the tabs across the top of the main VCDS Screen under electronics 1 but when I sect it, there is no module, so something is different...

 

I know this is an old thread, but I recently purchased a 2016 Touareg LUX TDI, and the bluetooth sound reception for whoever is listening to the person in the car is the worst I've ever heard. I have tried finding the mic sensitivity in VCDS and have had no luck for this model year. Same goes for finding the Green Screen. I have tried every way I can find through searches, and my car either doesn't have those modules, or they don't connect, and the button pushing to get to the green screen doesn't do it, either.

I did pull off the cover to the Homelink panel to access the microphones, though, and stuffed the empty space between them and the roof with foam from jewelry boxes. This made a remarkable improvement. It's still not crystal clear, but it no longer has the choppy, intermittent sound that it had before. I may try to find some better foam or sound deadener and re-do it. Here is a picture of what it looks like with the cover off. There are tabs on all four sides of the cover, but the largest ones are on top, so I recommend prying up the cover from the bottom first. I managed to do it without damage.

I would still like to play with the mic sensitivity, so if anyone knows how to do that via VCDS on a 2016 model I would appreciate it.