S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Command unit -- System unavailable

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Old 08-25-2010, 08:15 PM
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S500 1997 + S600 2005
Unhappy Command unit -- System unavailable

While trying to run an Apple Ipod on the mObridge command system, suddenly, an error message---System Unavailable--- now pops up. Although the Command unit comes on, the radio, CD, Nav CD, etc, etc do not work. Is that a serious issue?

Any ideas?

Last edited by ANGMED; 08-25-2010 at 08:58 PM.
Old 08-26-2010, 01:00 PM
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Smile Responding my own question

For future reference, if helpful to someone else.

Apparently, there is a fail safe level of battery charge that automatically powers off the Command unit in order to stop drain on the battery, thus, saving enough power for the car to start.
I had been playing with the Ipod for a long time with the car off, and obviously drained the battery beyond that fail safe level.

After charging the battery this morning, the Command unit came back to operation, and "happiness" came roaring back.
Old 08-26-2010, 02:34 PM
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Thanks for the update, Angmed. Often, the message that pops up in that situation is "Electrical Consumers Not Available" or something similar.
Old 02-03-2011, 11:48 PM
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09' GL550, 05' S55 (sold), 04' Yukon Denali XL, 05' 745il (sold), 01' 740il (sold)
what was your fix, to unplug the IPOD??? Mine is doing the same thing.
Old 02-04-2011, 11:31 AM
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He started the car and charged the battery, which his audio system (including the iPod) had run down when he used it for a time without running the engine. The system will shut down "electrical consumers" in order to try to conserve enough power to start the engine. This situation is described in the owner's manual.

There was no need to disconnect the iPod.

If your system is doing this while the engine is running, you have a different problem. We'd need more information to try to resolve it.

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