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

2010 S400 hybrid battery dies too often

Old Nov 13, 2021 | 05:08 PM
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2010 S400 hybrid battery dies too often

Recently a hybrid s400 couldn't start and there's no light on the dash at all, totally dead. The car was sitting for about 5 weeks. The car can be jump-started and let it running idle for about 30 mins, but when start to drive just about 50 feet or so, it completely die again. Both battery and aux battery were replaced new by dealer 5 months ago, for the same problem.

Hence the batteries were replaced not long ago (if the dealer actually replace them) and the car has not been driving for just about 5 weeks, I don't think the new batteries should drain that soon. This car has not beed driven much. After got the car back from the dealer 5 months ago, it was driven once a month without any issue or warning. Before sitting for 5 weeks and the problem occurred. Any thought on what'd cause it?

Right now it was towed to a dealer and still waiting for them to get back with the diagnosis.
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Old May 26, 2022 | 06:35 PM
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'20 S63
Any update on this?
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Old Jun 12, 2022 | 07:48 PM
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2014 E350 Wagon, 2009 SL550 no ABC
With problems like that, just remove the hybrid stuff to make it a great, economical and reliable car (PM me for details if you want to have it done).
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