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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2012 S550 command display

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Old 08-31-2018, 04:36 PM
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S550
2012 S550 command display

My command display went blank/black and won't turn on.

The AC works but nothing else.
Old 08-31-2018, 04:42 PM
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2007 S550 4Matic
Check the consumer battery. Actually, you don't have one in the back like I do, so check the front one.
Old 08-31-2018, 05:00 PM
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suggesting I replace the battery or just disconnect to restart the command display?
Old 09-01-2018, 11:12 AM
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Originally Posted by mitchellmark
suggesting I replace the battery or just disconnect to restart the command display?
Have the battery tested. There is an on/off button on the center console, it could just be turned off.

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