LOST OF SOUND SYSTEM

  • Tiny
  • Caljoy
  • 2004 Mercedes Benz E320
  • 6 CYL
  • 2WD
  • automatic
  • 95,000 miles

What cause's message display ( Battery Protection convience functions temporariliy unavailable)

Tuesday, July 12th, 2011 AT 5:05 AM

3 Answers

  • Tiny
  • rivermikerat
  • Expert
  • 6,155 posts

Check the condition of the auxiliary battery first, then check the main if the auxiliary checks good. It's one or the other.

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Tuesday, July 12th, 2011 AT 5:22 AM
  • Tiny
  • Caljoy
  • Member

Both batteries have already been replaced

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Tuesday, July 12th, 2011 AT 5:30 AM
  • Tiny
  • rivermikerat
  • Expert
  • 6,155 posts

The message you mention pertains to an issue with the battery system. Using a multi-meter, make sure the alternator is putting out between 13.4 and 14.2 volts with the engine running and headlights turned on. If not, you have an issue with the alternator or regulator.

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Tuesday, July 12th, 2011 AT 10:54 PM

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