E-Class (W212) 2010 - 2016: E 350, E 550
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Comand shutting down randomly

Old Jun 20, 2024 | 07:27 PM
  #1  
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2013 E550 coupe
Comand shutting down randomly

Anyways, I'm having an issue with my comand shutting off intermittently and would appreciate any advice very much so.

When it shuts off, I have to pull the fuse in the front sam, disconnect the negative terminal on the battery, or wait for it to turn on. It only turns on when I first get in the car and never while driving.

I've attached a few




pics that show the exact comand system I have, as well as the errors that I found while in engineering mode
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Old Jun 20, 2024 | 08:28 PM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by sd77
Anyways, I'm having an issue with my comand shutting off intermittently and would appreciate any advice very much so.

When it shuts off, I have to pull the fuse in the front sam, disconnect the negative terminal on the battery, or wait for it to turn on. It only turns on when I first get in the car and never while driving.

I've attached a few....


pics that show the exact comand system I have, as well as the errors that I found while in engineering mode
There you go! Look at the pic above regarding "CAN-B screwing your COMAND".
Excellent data collection to help yourself

Your CAN-B is loaded with enough chais that CMD can not interact.

I recall after sanitizing my CAN-B modules that CMD starts super fast unlike slow poke.

Pls scan your whole car for stored + current faults of ALL modules.
DCU + KeylessG ...

BEWARE of GOOFY CAN-B DRAINING YOUR BATTERY WHILE PARKED.... CTEK FLOAT CHARGER!!

+++++ clues ++++
What tells me its a soft-crash is your excellent reboot procedure. It's not a hard fault as it can be unfrozen by reboot.

Actually best to reboot whole car with both BATT GND disconnected (NOT shorted (-) to (+)... NIET!)

The No1 crazy chief is ... CGE/F-SAM: no fuse to reboot these guys

Last edited by CaliBenzDriver; Jun 20, 2024 at 08:37 PM.
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Old Jun 21, 2024 | 05:48 PM
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2013 E550 coupe
Auxiliary battery location

Can someone please tell me where I can find my auxiliary battery?

WDDKJ7DB8DF202295
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Old Jun 21, 2024 | 08:22 PM
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Originally Posted by sd77
Can someone please tell me where I can find my auxiliary battery?

WDDKJ7DB8DF202295
there are 4 locations:
  1. inside rear trunk floor (ECO "Motorcycle" batt)
  2. engine bay in the place of main Batt.
  3. dashboard driver side (small RLA batt)
  4. passenger footwell (Farad caps module)
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Old Jun 21, 2024 | 08:45 PM
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...so I disconnected the positive and negative and held them together to reset and now the comand won't turn on at all? Hmm. I attempted to pull fuse like before and nothing. Ideas? Thank you
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Old Jun 21, 2024 | 10:35 PM
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Thank you for the info, much appreciated.

so after returning to my vehicle the stereo turned on and then shut it down immediately
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Old Jun 22, 2024 | 12:07 AM
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W212 MY'14 M276-3.5NA @75kMi
Originally Posted by sd77
...so I disconnected the positive and negative and held them together to reset and now the comand won't turn on at all? Hmm. I attempted to pull fuse like before and nothing. Ideas? Thank you
Did you read that ....
"Actually best to reboot whole car with both BATT GND disconnected
(NOT shorted (-) to (+)
"

Before we conclude the priceless CMD unit needs attention, scan your chassis for faults with a LAUNCH ELITE scanner (not a $5 BT dongle!) or better Xentry.

++++ CMD vs. ESP :
CMD is many folds harder to deal with than ESP! ++++++

Last edited by CaliBenzDriver; Jun 22, 2024 at 12:14 AM.
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