Resolved: Bluetooth problem when connected to MB Bluetooth and MMI BT receiver
Thread Starter
Newbie
Joined: Nov 2021
Posts: 2
Likes: 2
Mercedes SLK, ML, GL
Resolved: Bluetooth problem when connected to MB Bluetooth and MMI BT receiver
To add music over Bluetooth, an option is to attach a Bluetooth receiver to the MMI port (30 pin or stereo aux input)
However I ran into a problem that if both Bluetooth devices are connected to my Samsung Note 20 ultra, the incoming phone audio would get muted for a few seconds once in a while. Very annoying.
This only happens when the phone is connected to both Mercedes comand and after market BT on MMI.
I tried INVERY and Hain brand BT MMI receivers. Both with the same issue. Actually I think it's the phone problem. I also tried all phone settings and developer modes with no luck.
I wanted to use the Mercedes BT for phone as it has much better sound than a BT car kit.
So, I took matters to my hand after a month of frustration, and reading forums.
Using Tasker ( Android App), I created a profile that would detect if I'm in a phone call, and disconnect the after market music BT connection. Once the call finishes, it would reconnect it.
Two profiles in Tasker, one to detect a call and disconnect .
Other to reconnect BT after call ends.
I will try to attach the Tasker files to this post.
However I ran into a problem that if both Bluetooth devices are connected to my Samsung Note 20 ultra, the incoming phone audio would get muted for a few seconds once in a while. Very annoying.
This only happens when the phone is connected to both Mercedes comand and after market BT on MMI.
I tried INVERY and Hain brand BT MMI receivers. Both with the same issue. Actually I think it's the phone problem. I also tried all phone settings and developer modes with no luck.
I wanted to use the Mercedes BT for phone as it has much better sound than a BT car kit.
So, I took matters to my hand after a month of frustration, and reading forums.
Using Tasker ( Android App), I created a profile that would detect if I'm in a phone call, and disconnect the after market music BT connection. Once the call finishes, it would reconnect it.
Two profiles in Tasker, one to detect a call and disconnect .
Other to reconnect BT after call ends.
I will try to attach the Tasker files to this post.
Last edited by afshari; Nov 29, 2021 at 01:09 AM. Reason: re attaching files
Super Member
Joined: Nov 2019
Posts: 648
Likes: 144
From: Yeast Coast, Canada
GL550 X164
Interesting. I have an S10 and use a BT adapter under $20 which connects directly to the MMI port to stream music. I don't run into your connectivity problem. I wonder if the Apple 30 pin adapter is part of the problem. I have that also but I don't have any use for it as I'm not in an Apple ecosystem.
Super Member
Joined: Jun 2013
Posts: 804
Likes: 74
From: Staten Island, NY
2010 MB S550, 2017 MB SLC 300
I have a similar issue where incoming or outgoing calls drop out. I can't hear the caller. It could last anywhere from 5 seconds to 30 seconds. Needless to say, this is very annoying. This issue is happening on all phones that are connected to the car, Apple or Samsung. I have the Tune to Air in both the GL & my S Class. I don't have issues with the one in the S Class.
Thread Starter
Newbie
Joined: Nov 2021
Posts: 2
Likes: 2
Mercedes SLK, ML, GL
So far the Tasker profile is working for me (mostly).
Issues are:
After a reboot, I need to start Tasker. It doesn't start automatically.
It works for phone calls, but call connection for MS teams, didn't trigger the Tasker scripts.
Also, if the call is to long the Bluetooth receiver shuts off.
Issues are:
After a reboot, I need to start Tasker. It doesn't start automatically.
It works for phone calls, but call connection for MS teams, didn't trigger the Tasker scripts.
Also, if the call is to long the Bluetooth receiver shuts off.
Junior Member
Joined: Sep 2017
Posts: 65
Likes: 10
From: Chicago Suburbs
2006 R500; 2018 GLE350
Just to share an issue I discovered for those using Apple. I found this on my '09 ML550 and then my '09GL550. Bluetooth worked perfectly, until one day it didn't. After years of searching, I found that the problems began when I got an Apple Watch. Then it started for my wife when she got an Apple Watch. It appears these cars don't work well when the phone is connected to 2 bluetooth devices at the same time. The workaround for me was to disable bluetooth on the watch when making a call. It works, but cuts in and out, sometimes you can't hear anything, but the other person does. This doesn't happen with my BMW.
Anyhow, we don't take long rides anymore, but would be interested in Bluetooth Music streaming. All the options I saw were almost a 100 bucks. What can I get for like 20 bucks or so to try that works well with iPhones? I too was worried about the switching between Mercedes Bluetooth and Bluetooth Audio.
Anyhow, we don't take long rides anymore, but would be interested in Bluetooth Music streaming. All the options I saw were almost a 100 bucks. What can I get for like 20 bucks or so to try that works well with iPhones? I too was worried about the switching between Mercedes Bluetooth and Bluetooth Audio.
Super Member
Joined: Jun 2013
Posts: 804
Likes: 74
From: Staten Island, NY
2010 MB S550, 2017 MB SLC 300
Just to share an issue I discovered for those using Apple. I found this on my '09 ML550 and then my '09GL550. Bluetooth worked perfectly, until one day it didn't. After years of searching, I found that the problems began when I got an Apple Watch. Then it started for my wife when she got an Apple Watch. It appears these cars don't work well when the phone is connected to 2 bluetooth devices at the same time. The workaround for me was to disable bluetooth on the watch when making a call. It works, but cuts in and out, sometimes you can't hear anything, but the other person does. This doesn't happen with my BMW.
Anyhow, we don't take long rides anymore, but would be interested in Bluetooth Music streaming. All the options I saw were almost a 100 bucks. What can I get for like 20 bucks or so to try that works well with iPhones? I too was worried about the switching between Mercedes Bluetooth and Bluetooth Audio.
Anyhow, we don't take long rides anymore, but would be interested in Bluetooth Music streaming. All the options I saw were almost a 100 bucks. What can I get for like 20 bucks or so to try that works well with iPhones? I too was worried about the switching between Mercedes Bluetooth and Bluetooth Audio.
Super Member
Joined: Nov 2019
Posts: 648
Likes: 144
From: Yeast Coast, Canada
GL550 X164
The S might not be the same NTG version as the GL. 2007-08 GLs have NTG2, 2009-12 have NTG2.5.
We are not an Apple household so I don't have experience with Apple products and BT streaming in the GL. That said, I use this to stream via BT in our 2010
Note that it connects directly in the MMI port in the glove box rather than use the MB MMI cable. No issues with phone calls or streaming cutting in/out. If I am streaming and get a call, I can answer the call, the podcast or music pauses, after I hang up it will resume. The downside is that you can't use the steering wheel buttons to navigate the content from your phone, but that's not a problem for me. I can set up podcast and music playlists which works for me. The volume buttons on the wheel work as they should.
The Bovvee product (and there is also another one the name which I can't recall now) apparently allows you to navigate content on Apple using the steering wheel buttons, but I have no experience with it and like I said earlier, we are not an Apple household.
Edit: This is more like what I am using. I seemed to have pasted the wrong link earlier.
We are not an Apple household so I don't have experience with Apple products and BT streaming in the GL. That said, I use this to stream via BT in our 2010
Note that it connects directly in the MMI port in the glove box rather than use the MB MMI cable. No issues with phone calls or streaming cutting in/out. If I am streaming and get a call, I can answer the call, the podcast or music pauses, after I hang up it will resume. The downside is that you can't use the steering wheel buttons to navigate the content from your phone, but that's not a problem for me. I can set up podcast and music playlists which works for me. The volume buttons on the wheel work as they should.
The Bovvee product (and there is also another one the name which I can't recall now) apparently allows you to navigate content on Apple using the steering wheel buttons, but I have no experience with it and like I said earlier, we are not an Apple household.
Edit: This is more like what I am using. I seemed to have pasted the wrong link earlier.
Last edited by expl0rer; Jan 25, 2022 at 11:26 AM.
