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Hi i have noticed my 200amp fuse is 32v and the 200amp i have purchased is 58v is this still safe to use??
if the fuse is branded it is safe to use. The 58V is not a problem for 12V system. The amps which matters.
But becareful when buying fuse if not branded, as there are too many garbage/fake ratings out there.
Maybe you have a compatibility issue with that as well
Although you say you checked that it matches VIN
Post the picture of the labels and let us have a look
Sounds like it's booting with the Mercedes logo showing, but there's no program to drive it
Someone has bricked it possibly, trying to change or update software
I take it all the connectors are seated properly
I think I may have made a mistake.
I had checked the vin of the mbrace system and mistakenly thought that was some codename for the headunit since it said it was unable to detect what version the headunit was, so I had to manually enter it.
before you remove the head for exploration... LISTEN for the usual CD/DVD-Player restart noise.
The quick boot abort sequence may be looking for a key press to open maintenance menu before it quits.
To recognise where each screw goes: MARK HOLES DURING disassembly.
you divide screw types in categories each with distinctive signage you apply with a black marker when removing screws.
a dot or multiples
a triangle with 1-2-3 dots
a line with 1-2-3 dots
The way this unit fails reliably make it a possibility we are dealing with an amazing design features: the nearly good capacitors and solderless
The only sound our headunit makes is the fan occasionally coming on, I've never heard the CD changer make a sound, it seems to be jammed. I tried plugging in the power and display cables after removing some board thinking that they may be preventing it from booting but it never showed signs of life. The thing that puzzles me is that the unit isn't totally bricked. The radio plays, the backup camera will show up briefly, and if the headunit is removed the car can't be locked with the key fob.
if the fuse is branded it is safe to use. The 58V is not a problem for 12V system. The amps which matters.
But becareful when buying fuse if not branded, as there are too many garbage/fake ratings out there.
The only sound our headunit makes is the fan occasionally coming on, I've never heard the CD changer make a sound, it seems to be jammed. I tried plugging in the power and display cables after removing some board thinking that they may be preventing it from booting but it never showed signs of life. The thing that puzzles me is that the unit isn't totally bricked. The radio plays, the backup camera will show up briefly, and if the headunit is removed the car can't be locked with the key fob.
Congrats on this rate achievement - Now let's try to get your module to work again!
The unit does play sound for a really short time.
We both have suspicion on the quiet CD/DVD being inoperative and stopping the boot enumeration process(**).
inspect internal PCB and connectors
Let's conduct an inspection for poor connections....
Identify what harness connects DVD.
> Look at where this harness lands on circuit boards:
1- PCB of head unit
2- PCB of DVD sub-unit
> How are these connector?
- Normally soldered or loose pins ??
- Show us close up picture...
> (**): Failed Boot process (external MOST):
- We have seen how this unit enumerates all its peripherals at boot to attribute them a Number in the device list.
- We have seen that any missing device will cause gaps to be eroneously filled by next device.
- Ex: when satellite module is missing its position becomes filled by next... say the amplifier that then goes missing!
- Everything in the MOST ring becomes scrambled!!
- The internal devices have an enumerated order:
.. AM/FM Radio
.. DVD Player
.. HDD register music storage
... .xyz.
> When one is missing > enums fails > boot is alted. Exactly what you're witnessing.
This is the opposite of resilient system. Any peripheral fault disables the system: amazin!
Now we are focused on the "quiet DVD" module.
> PLAN B:
Can we edit the polling enumeration list to disable DVD option.
A working head with no DVD!?!
++++ CD/DVD INITS...
-- Normally at startup you should hear the CD Player run a 2Secs. self-check during each boot while text is being displayed.
-- Trace the DVD power feed pins from Mitsubishi unit.
++++ Oxidized pressed pins.... the amazin' money pins
If you find stuff like that... problem found!
🤞
Last edited by CaliBenzDriver; Jun 29, 2024 at 03:53 PM.
Congrats on this rate achievement - Now let's try to get your module to work again!
The unit does play sound for a really short time.
We both have suspicion on the quiet CD/DVD being inoperative and stopping the boot enumeration process(**).
inspect internal PCB and connectors
Let's conduct an inspection for poor connections....
Identify what harness connects DVD.
> Look at where this harness lands on circuit boards:
1- PCB of head unit
2- PCB of DVD sub-unit
> How are these connector?
- Normally soldered or loose pins ??
- Show us close up picture...
> (**): Failed Boot process (external MOST):
- We have seen how this unit enumerates all its peripherals at boot to attribute them a Number in the device list.
- We have seen that any missing device will cause gaps to be eroneously filled by next device.
- Ex: when satellite module is missing its position becomes filled by next... say the amplifier that then goes missing!
- Everything in the MOST ring becomes scrambled!!
- The internal devices have an enumerated order:
.. AM/FM Radio
.. DVD Player
.. HDD register music storage
... .xyz.
> When one is missing > enums fails > boot is alted. Exactly what you're witnessing.
This is the opposite of resilient system. Any peripheral fault disables the system: amazin!
Now we are focused on the "quiet DVD" module.
> PLAN B:
Can we edit the polling enumeration list to disable DVD option.
A working head with no DVD!?!
++++ CD/DVD INITS...
-- Normally at startup you should hear the CD Player run a 2Secs. self-check during each boot while text is being displayed.
-- Trace the DVD power feed pins from Mitsubishi unit.
I put the unit back together and noticed that the Keyless GO button only works when the headunit is plugged in. I checked all the connectors between boards, solders seemed fine. The ribbon cables for the CD player looked fine but I didn't test them. I think that there might be something wrong with the CD changer and if that could result in a boot failure then that might be the problem. As a side note, the radio always worked, but is stuck on one station and can't be changed.
Does applying 12v to the CD changer cause it to do something?
I put the unit back together and noticed that the Keyless GO button only works when the headunit is plugged in. I checked all the connectors between boards, solders seemed fine. The ribbon cables for the CD player looked fine but I didn't test them. I think that there might be something wrong with the CD changer and if that could result in a boot failure then that might be the problem. As a side note, the radio always worked, but is stuck on one station and can't be changed.
Does applying 12v to the CD changer cause it to do something?
let me record my DVD Init sound for ya!
---> ok got it: listen at 20sec mark.
This boot takes place ONCE right after car is awakened by unlocking it.
After that the head unit will simply turn on but no "reboot", one time deal.
> ANOTHER PLAN B: TRANSPLANTATION ?
If DVD won't cooperated then exchange just the DVD unit into your own NTG Head.
That way coding avoided to please Keyfob security checks.
Last edited by CaliBenzDriver; Jun 29, 2024 at 08:15 PM.
We know those tiny DC Motors have short brushes to limit life span as found in our door lock modules. 3 tiny motors
1 motor moves the optical pick-up assembly with laser diodes
2 others move the tray up/down and CD's in out of stirage onto spindle.
If something's jammed then power us removed to prevent damage.
We've seen that this type of unit use optical sensors to locate hardware position. If you live in a dusty environment then these sensors can go blind.
I powered all the motors with an external power supply and made sure they work. When I put the unit back together, I tried putting a CD in and nothing happened. We removed all CDs from inside and everything seemed to move freely, it was also pretty clean.
let me record my DVD Init sound for ya!
---> ok got it: listen at 20sec mark.
This boot takes place ONCE right after car is awakened by unlocking it.
After that the head unit will simply turn on but no "reboot", one time deal.
> ANOTHER PLAN B: TRANSPLANTATION ?
If DVD won't cooperated then exchange just the DVD unit into your own NTG Head.
That way coding avoided to please Keyfob security checks.
So just removing the DVD outright and trying the unit won't work? I don't really want a CD player either, is there some sort of way to just cut it out of the loop?
So just removing the DVD outright and trying the unit won't work? I don't really want a CD player either, is there some sort of way to just cut it out of the loop?
Good thinking...
I am pretty positive there is a way to set up its configuration. I've screwed with a lot of things but not THE DEVICE LOOP CONFIG.
Perhaps a LAUNCH scanner or Xentry/Vediam
I hope you can dig up past this.... scarce.
We need more than display menu
NEED R/WR privileges to edit config.
They do have a serial interface port. I saw through video.
Last edited by CaliBenzDriver; Jun 29, 2024 at 09:26 PM.
Good thinking...
I am pretty positive there is a way to set up its configuration. I've screwed with a lot of things but not THE DEVICE LOOP CONFIG.
Perhaps a LAUNCH scanner or Xentry/Vediam
I hope you can dig up past this.... scarce.
We need more than display menu
NEED R/WR privileges to edit config.
They do have a serial interface port. I saw through video.
There is a port in the back that was covered with some sort of anti-tamper tape, is that the serial port? I've got access to Xentry diagnostics and just today installed Vediamo. What would I need to get to communicate with the Headunit through the serial port?
It's starting to look like a faulty HDD
System boots (like BIOS) which shows the MB logo
but then it won't run because there is no operating system to be found
Probably uses Windows Automotive loaded on the HDD, that way you can update it easily
HDD is kaput I'd say
It's starting to look like a faulty HDD
System boots (like BIOS) which shows the MB logo
but then it won't run because there is no operating system to be found
Probably uses Windows Automotive loaded on the HDD, that way you can update it easily
HDD is kaput I'd say
I don't feel the drive spinning when the headunit is in the car. I tried putting the drive on my PC with an external usb adapter and felt it spin but it wasn't recognized.
Well, if you held the buttons down for 10 seconds and nothing happened, then it looks like the HDD is faulty
because that is where the program would be run from, and it ain't there to be run
and all the data it collects would be stored on the HDD to be retrieved in diagnostics
Well, if you held the buttons down for 10 seconds and nothing happened, then it looks like the HDD is faulty
because that is where the program would be run from, and it ain't there to be run
and all the data it collects would be stored on the HDD to be retrieved in diagnostics
I've got a new ssd laying around, is there something I can do with that? Is there a way to install the OS on it?
HDD has bad sectors, or the HDD circuit board input/output faulty and it won't read or write
Anyway that seems to be the problem
Only way to prove that is swap out the HDD with a known good one that is programmed
Upgrade to SSD would be fantastic
Will only work if the computer is going to recognise the SSD
You'd need to get hold of the operating system software, load it and try it
Which is probably the SW number A2129020824 on your label
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
