which usb port for...
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Senior Member
Joined: Mar 2002
Posts: 321
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From: Nappanee Indiana
2026 E450
which usb port for...
I posted a question about manual nav updates that was long winded because of this issue. yes I know that the passenger side port can be used to update maps manually. the question is why when I put a stick in that port for the dash cam does no other port allow music to be played as a media player? when I select the media option in mbux it says not device found regardless of whether I put the stick in the arm rest drivers side port or along side the stick which is being used for the dash cam. this is very frustrating since it should be easy for the system to see any stick inserted and then use it accordingly particularly if there is one port in use for the dash cam. or am I totally wrong. greatly appreciated if anyone can solve this issue or confirm that the usage of 2 ports is not possible. thanks in advance.
Super Member
Joined: Dec 2008
Posts: 554
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From: USA
2021 GLE450W4 SUV
I posted a question about manual nav updates that was long winded because of this issue. yes I know that the passenger side port can be used to update maps manually. the question is why when I put a stick in that port for the dash cam does no other port allow music to be played as a media player? when I select the media option in mbux it says not device found regardless of whether I put the stick in the arm rest drivers side port or along side the stick which is being used for the dash cam. this is very frustrating since it should be easy for the system to see any stick inserted and then use it accordingly particularly if there is one port in use for the dash cam. or am I totally wrong. greatly appreciated if anyone can solve this issue or confirm that the usage of 2 ports is not possible. thanks in advance.
Thread Starter
Senior Member
Joined: Mar 2002
Posts: 321
Likes: 36
From: Nappanee Indiana
2026 E450
Super Member
Joined: Jan 2020
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From: Fredericksburg, VA
2020 Mercedes GLE350 4Matic; 2023 Tesla Model Y
I posted a question about manual nav updates that was long winded because of this issue. yes I know that the passenger side port can be used to update maps manually. the question is why when I put a stick in that port for the dash cam does no other port allow music to be played as a media player? when I select the media option in mbux it says not device found regardless of whether I put the stick in the arm rest drivers side port or along side the stick which is being used for the dash cam. this is very frustrating since it should be easy for the system to see any stick inserted and then use it accordingly particularly if there is one port in use for the dash cam. or am I totally wrong. greatly appreciated if anyone can solve this issue or confirm that the usage of 2 ports is not possible. thanks in advance.
Super Member
Joined: Dec 2008
Posts: 554
Likes: 146
From: USA
2021 GLE450W4 SUV
I tried an experiment today. I downloaded the latest map/voice file updates to my USB stick. I plugged that in in the armrest port and started the software update. At the same time I had my dash cam recording to that USB stick and everything worked ok. I should have tried playing music from that USB stick but alas...
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Thread Starter
Senior Member
Joined: Mar 2002
Posts: 321
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From: Nappanee Indiana
2026 E450
your previous information as I stated caused me to put a way overkill T-5 drive in. after putting the old stick in my pc I found that mbux creates a folder for the dash cam and then reads the other root drive as media. so with the T or any stick large enough to hold the 19GB of nav for the rest of the united states that I manually updated AND your music should be fine. I would guess a 32 GB stick would be fine unless you have a huge music collection.
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Super Member
Joined: Dec 2008
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From: USA
2021 GLE450W4 SUV
your previous information as I stated caused me to put a way overkill T-5 drive in. after putting the old stick in my pc I found that mbux creates a folder for the dash cam and then reads the other root drive as media. so with the T or any stick large enough to hold the 19GB of nav for the rest of the united states that I manually updated AND your music should be fine. I would guess a 32 GB stick would be fine unless you have a huge music collection.
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From: Pennsylvania
2024 GLE 450 4matic
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Or is it possible to make the music read only so the car can't overwrite it? Unless if MBUX does low level writing, it will bypass those restrictions though.
Super Member
Joined: Apr 2020
Posts: 775
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From: Pennsylvania
2024 GLE 450 4matic
Any chance there is another port that you can put the music on (or perhaps a usb stick instead) while also having the dashcam sd card plugged in?
Or is it possible to make the music read only so the car can't overwrite it? Unless if MBUX does low level writing, it will bypass those restrictions though.
Or is it possible to make the music read only so the car can't overwrite it? Unless if MBUX does low level writing, it will bypass those restrictions though.
Last edited by Lucky 777; May 12, 2025 at 11:10 AM.
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From: Pennsylvania
2024 GLE 450 4matic
So I discovered you can view your dashcam videos on the screen in the car, folders are named by date....that was cool. Barry White's Greatest Hits played on another USB plugged in the usb next to the phone charger played as expected. Switching between XM and the USB was done by pressing the radio/media button in the center console. Dashcam recording continued on its own and wasn't affected by what I was doing with the radio.
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
So I discovered you can view your dashcam videos on the screen in the car, folders are named by date....that was cool. Barry White's Greatest Hits played on another USB plugged in the usb next to the phone charger played as expected. Switching between XM and the USB was done by pressing the radio/media button in the center console. Dashcam recording continued on its own and wasn't affected by what I was doing with the radio.
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