S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

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Old Jun 9, 2022 | 04:20 PM
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Besnikbx's Avatar
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2010 ML350 4Matic
Post Command not working

So I have a 2009 S550. The display doesn't turn on and stays black. The CD changer does not load or eject any CD and when you select a disk the button doesnt light up. All the fuses seem good. I have disassembled the headunit from the car. The unit gets warm so I assume there is power running to it. I opened the harddrive bay and the disk is spinning. the model number is a BE 7012.

I used my launch diagnostic too to scan for codes and nothing related to that. I was able to get the screen to engage through the test mode on the launch and have it say diagnosis, do a color test and a stripes test. the climate controls showed up breifly but the screen went black. I'm not sure what I should do from here. Should I get a new headunit or is the issue something else?

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Old Jun 10, 2022 | 03:26 AM
  #2  
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From: South Padre Is, Texas
2007 S600, 911 & XJ8
Hi Besnikbx:

Any chance you hit the button to the lower right of the console wheel? I know this is a shot in the dark, but guess who also thought their Comand screen died?

Regards... Mark
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Old Jun 10, 2022 | 12:21 PM
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2010 ML350 4Matic
Originally Posted by mcypert
Hi Besnikbx:

Any chance you hit the button to the lower right of the console wheel? I know this is a shot in the dark, but guess who also thought their Comand screen died?

Regards... Mark
thanks for the reply mark. I did try it hoping it was that but unfortunately that didn’t work.
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Old Apr 10, 2024 | 12:45 AM
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s221 s65 amg
Interesting

did you ever figure this one out?




Originally Posted by Besnikbx
So I have a 2009 S550. The display doesn't turn on and stays black. The CD changer does not load or eject any CD and when you select a disk the button doesnt light up. All the fuses seem good. I have disassembled the headunit from the car. The unit gets warm so I assume there is power running to it. I opened the harddrive bay and the disk is spinning. the model number is a BE 7012.

I used my launch diagnostic too to scan for codes and nothing related to that. I was able to get the screen to engage through the test mode on the launch and have it say diagnosis, do a color test and a stripes test. the climate controls showed up breifly but the screen went black. I'm not sure what I should do from here. Should I get a new headunit or is the issue something else?
Reply

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