Dashcam "Device is too slow"
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Joined: Nov 2022
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2023 C300 4MATIC AMG Line
Dashcam "Device is too slow"
My factory dashcam function is set to Loop Recording, which automatically starts every drive of the car, and will overwrite the oldest recording when the flash drive gets full. I have an inexpensive (~$10) 128GB USB-C drive for this purpose.
I get the titled error sometimes, and have determined that it happens when the flash drive gets full. I find myself wondering if it's the cheapo drive itself or some issue with MBUX. This only happens every few weeks, so it's not a huge issue, but it is annoying when you're driving down the road and get the error.
Anyone have any thoughts?
I get the titled error sometimes, and have determined that it happens when the flash drive gets full. I find myself wondering if it's the cheapo drive itself or some issue with MBUX. This only happens every few weeks, so it's not a huge issue, but it is annoying when you're driving down the road and get the error.
Anyone have any thoughts?
Senior Member
Joined: Jun 2022
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From: Houston TX
2023 C Class
Never happened to me.
I bought this usb A flash drive and a usb C to usb A cable
I bought this usb A flash drive and a usb C to usb A cable
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2023 C300 4MATIC AMG Line
). Looks like future iPhones will be USB-C, though (thanks Europe!), so I'll have to buy new cables when we replace ours, whenever that is.
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From: Houston TX
2023 C Class
My dealer gave me that adapter cable at delivery. I didn't want that flopping around in the well so I bought a USB-C flash drive. I did buy USB-C to lightning cables for our phones and two for back seat passengers (which will be pretty rare, but I'm a nice guy ). Looks like future iPhones will be USB-C, though (thanks Europe!), so I'll have to buy new cables when we replace ours, whenever that is.
). Looks like future iPhones will be USB-C, though (thanks Europe!), so I'll have to buy new cables when we replace ours, whenever that is.
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
It's very likely your cheapo flash drive. The write speed is probably too low. Also just because it's USB-C doesn't mean it supports a fast USB 3 connection. It may only be USB 2. You have to look at the specs. I haven't looked, but the owner's manual may specify the required specs for the flash drive to use. Often devices have specific minimum requirements for write speed. An HD video feed requires a certain bandwidth.
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Joined: Jul 2018
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From: Oregon
2018 GLC300, 2025 GLE 450e
Great info on this thread!
One concern I had was leaving a thumb drive plugged in and getting in the way when accessing the center console. The Samsung drive looks like the smallest physical size but doesn't it still get in the way? Would be nice if fast compact sized drives that use a cable could rest in the small cubby in the console but typically those cables are too short.
Also, approximately how quickly does a 128GB drive get filled up?
One concern I had was leaving a thumb drive plugged in and getting in the way when accessing the center console. The Samsung drive looks like the smallest physical size but doesn't it still get in the way? Would be nice if fast compact sized drives that use a cable could rest in the small cubby in the console but typically those cables are too short.
Also, approximately how quickly does a 128GB drive get filled up?
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C300
128gb can only hold up to 1 hour of footage.
I'm encountering the same issue and I'm using the USB A to USB C adapter provided by Mercedes. My guess is that the adapter is only 3.0 compatible although my USB is 3.1, which is lowering the speed of the drive. I'm going to change the cable to see if it resolves it.
I'm encountering the same issue and I'm using the USB A to USB C adapter provided by Mercedes. My guess is that the adapter is only 3.0 compatible although my USB is 3.1, which is lowering the speed of the drive. I'm going to change the cable to see if it resolves it.
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Or maybe I am just thinking too much and it was actually because of bugs/glitches introduced in the update?
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From: United Kingdom
W206 C300e AMG Line Premium Plus with driver assistance package
I have this memory stick Kingston DataTraveler microDuo 3C USB Flash Drive 64GB USB Gen 3 Type-C and Type-A - DTDUO3CG3/64GB https://amzn.eu/d/bKRbxIV
I was getting the same error on average every couple of hours or so. Looking at the reviews the write speed isn’t the best so that might be the cause.
However here in the uk it doesn’t start automatically and with the poor quality I fitted a fitcamx dashcam instead.
I was getting the same error on average every couple of hours or so. Looking at the reviews the write speed isn’t the best so that might be the cause.
However here in the uk it doesn’t start automatically and with the poor quality I fitted a fitcamx dashcam instead.
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2023 C300 4MATIC AMG Line
I use the below-linked 256GB Samsung device. It's quite small and fits in the armrest storage console USB port quite nicely. It's also screaming fast, so we stopped getting the "too slow" errors we got with other drives.
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2023 C300
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From: Ontario, Canada
2014 ml63 and 2014 ml350 bluetec
For me I tried this device and it use work fine till a software update. I bought two of these same issue. Not sure what else to try.
QUOTE=23C300W4;8942892]I use the below-linked 256GB Samsung device. It's quite small and fits in the armrest storage console USB port quite nicely. It's also screaming fast, so we stopped getting the "too slow" errors we got with other drives.
[/QUOTE]
QUOTE=23C300W4;8942892]I use the below-linked 256GB Samsung device. It's quite small and fits in the armrest storage console USB port quite nicely. It's also screaming fast, so we stopped getting the "too slow" errors we got with other drives.
[/QUOTE]
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Joined: Nov 2020
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From: Fremont California in the San Francisco Bay area
2024 Mercedes E450
I used the Samsung 256GB USB-C version 3.2 stick listed by giovane as the solution for almost 2 years with no issues. Now "media too slow" for even new 3.2 sticks. Anyone have a different solution?
Last edited by jime; Apr 24, 2026 at 07:44 AM.
