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

Help with electronics! Car in "sleep mode" after removing key.

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Old Sep 19, 2012 | 10:23 PM
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Zerocarpileup's Avatar
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2008 S63
Help with electronics! Car in "sleep mode" after removing key.

2007 S550 GOS INTO SLEEP MODE AS SOON AS I TAKE THE TRANSPONDER OUT OF THE DASH NOTHING WORKS UNTIL I PUT IT BACK IN. The remote will not unlock or lock, the soft close doors go dead. It's as if the whole car is dead.
Once i put the key back in, the dash makes a unusal flash Then it's almost as if it reset everything. The clock winds back, the radio stations are all reset. Has anyone had this problem? Please help.
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Old Sep 20, 2012 | 01:13 AM
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Have you checked your consumer battery condition?
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Old Sep 20, 2012 | 03:26 AM
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Zerocarpileup's Avatar
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No not yet. I will first thing in the morning. What do you suspect?
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Old Sep 20, 2012 | 08:25 AM
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S500
You know there are two batteries in the car: one in the front (for starting), one in the trunk (consumer) later models have a different config with a smaller 2nd battery etc.
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