This is an expensive item. Maybe no solution was found, and owner just lived with it....

 

jzchen, yes I agree and they may be the case but it's not hard for someone to pop back and give and update is it ?

Anyway, thanks for a reply anyway.

Here is an update, can you tell me what you think:

Main battery voltage was 12.2v car off & 14.5v car running so alternator seems to be charging ok.

Battery in boot was 13.8 constant when car is running and when its off.

I've noticed today though,

When I got into the car this afternoon, screen flipped out and then back in again as per expected, so I pressed the button again and it came up but screen was black so I left it in this position.

Took car for a drive and was idling in car park for approx. 10 mins. with screen in the up position but black.

I decided to recycle ignition, low and behold the screen came on a comand booted normally....????

Now I'm thinking that to me it seems that it is a power/battery issue.

I primarily do short journeys and have lights on auto and looking back I replaced the headlight bulbs with nightbreaker as standard h7 bulbs were to me terrible and dim.

It may be that by completing short journeys isn't giving the battery enough time to recharge etc. and this is causing an issue when comand is booting from a cold start up.

What I am going to do now is::

1. Let the car sit for a period of time.
2. Before starting check voltage at battery to see what its reading because I'm nearly sure at one point I done this and battery was reading 11.8v but don't remember if command booted normally or not at this point.
3. Record reading and then cycle key
4. Check if command functions correctly
5. If not, take for drive or allow to idle
6. Check battery voltage and record reading
7. If over, 12v then recycle key
8. Check if command boots correctly
9. If so, replace battery or charge battery outside of vehicle
10. If not, back to square one and pull hair out.....

Any thoughts that this sounds sensible or I'm I just over thinking

 

If you have a battery charger/maintainer (automatic type), attach to jump points under hood. Test your concern by providing good voltage...

 

if I havnt got a battery charger available at the moment is it ok to join to another vehicle to provide additional voltage and just try command ?

 

Sure, same thing, just connect to jump points under hood. Better to have the other car on with engine running.

 

When screen flips up (black), then press and hold on/off (volume) buttom until unit restarts, this should solve the problem.
Be sure you have no PCIM in the memoryslot.

 

Solved ??

 

Just a quick update, still have this issue with the opening and closing of comand centre

anyone any other ideas or checks i can complete

cheers

 

It seems like you have a PCIM in the memoryslot ?

 

Sure looks like something is there.

 

I watched the video again. Isn't that the blank that comes with the car, and the eject pin was just depressed so is just sticking out ready to eject?

 

Sadly this happens on whether the is a card in the memory slot or not.

i have removed the SD card and it will still do the same.

I'm taking it to have it put onto Xentry/Star for diagnostics, hopefully that will show the error when cycling the screen etc.

hopefully it's not the comand head unit itself.

Still strange that it works at times as i would have said if it was the screen it wouldnt start at all unless it there is an issue with a failed capictor on the board that isnt holding the voltage being supplied to power and keep the screen running.

 

After remove SD card, unit needs hard reset if card where faulty.
Are you sure your battery is in good condition, could be the issue.

 

I agree with this question. What happened when you jumpered the cars together? No difference?

 

Had car on STAR system and during diagnostics cycle it came up with to errors:

1. Obsctruction at screen

2. Button jammed.

Screen cover power button would not not cycle to open the cover although in saying that, once off the diagnostic cyle through STAR it opened when pressing the the power button on top of the cover.

Once screen was open, but not on, connected STAR again and diagnostic cycle began, same errors were noted.

When following onscreen STAR fault finding procedure, i.e. pressing the power button on top of cover it was coming up "invalid" but when opening and closing the cover/screen through STAR Open/Close buttons it does actually open and close.

So, has anyone ever experienced issues with the button on top of the flip out cover, or the "tilt/close" button" perhaps.

the tilt button does not do anything when pressing but the close button beside it closes the cover/screen when pressing.

bit hard to explain this

any advice

cheers

Now there is only

 

Just want to give the forum a quick update in case any others have or are having the same issue.

In my case,

Turns out that the potentiometer within the display flip up mechanism is on its way out and seems to be giving out to much resistance which in turn is making the car think the display is being restricted and closes again.

It's a small part but finding one is the hard thing, it's not a serviceable part as far as i can see, there no Mercedes part number on it, as its part of the whole unit.

hopefully come across a scrapped one, the hunt goes on.

thanks for all of the advice.

 

I know its an old post.
2009 mercedes c300 here.
Im a dealer, got this car few days ago. exceptional condition.
flip up and stereo units- look like no power, dont work.
checked EVERYTHING.no help.
then watched a video how to remove stereo from these cars.
There they showed ,that theres fuse behind Stereo/radio unit itself, behind big black plug.
and there it was- blown fuse.
after two days of constant research and attempts, I couldnt believe it ,that Ive found the issue!
Im very happy.
So yes- blown fuse behind Stereo unit, if nothing else work for you.
And yes, You can remove vents ,while display is closed/shut. You just need to be careful.
Ive saved a lot of money,that will go my profit!!!

 

Thanks for sharing your experience @Alex Vaviloff and glad you got it working. Can you provide a link to the video for the benefit of others who might have this problem in the future?

 

i also have this issue , the screen comes in and out of its own accord, radio etc works fine, screen some times stays out but is black, if i pull the screen forward at the top with one finger it comes on and works, also bashing the dash when its retracted wakes it up,

 

Did you ever figured out what was the issue? I'm having the same issue with my radio, climate control, sunroof, flickering on/off sporadically

 

Xtreme_M23 did you solve the problem? Do you have a photo from the potentiometer (problem)?
I have exactly the same issues you have.

Thanks in advance!

 

Xtreme_M23 did you solve the problem? Do you have a photo from the potentiometer (problem)?
I have exactly the same issues you have.

Thanks in advance!

@Hitfence maybe you solved the issue somehow?
I believe it's the potentiometer affected, but I don't know what's the expected resistance to check if it's failing or not.

 

Hi Everyone, I have the same model, but my issue is different.

The system starts and there is no sound and the speakers keeps making scratch noise none stop even when I mute the sound. I have no idea is it a software or a hardware issue. does anyone faced the same problem?

 

Hi everyone I hope your problem was solved I am having problem with my screen , every thing works except that my screen flip open 40% when I pull it with my finger to help it open (works only while it is starting to open) it opens fully and every thing work fine, but should I do this every time I want to use the screen ! I am afraid that this problem will become more deep if I don’t solve it now.. any ideas? Thank you for any help

 

Hola buenas tardes tengo el mismo sistema que vosotros y mi problema es que la pantalla y el comand cuando apago el coche y cierro el cierre centralizado se enciende sola, todas las funciones funcionan pero me pasa eso que la radio se enciende sola automáticamente, luego también con el coche en marcha a veces al llevar el display bajado, luego al darle al botón para encenderla y que se levante pues no reacciona, y sin embargo con el coche en parado si que nunca tengo problema que al pulsar botón se levanta, a qué puede ser debido? Algún fusible o alguna idea para que alguien me pueda ayudar??
Muchas gracias!!

Translation by moderator:

Hello good afternoon I have the same system as you and my problem is that the screen and the command when I turn off the car and close the centralized closure is turned on alone, all the functions work but that happens to me that the radio is turned on automatically, then also with the car running sometimes when you carry the display down, then when you hit the button to turn it on and it gets up because it doesn't react, and yet with the car standing if I never have a problem that clicking button gets up, what can be due? Some fuse or some idea for someone to help me???
Thank you so much.