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Key battery replacement interval very short?

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Old 09-13-2018, 09:36 AM
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2005 C240 2011 R350
Key battery replacement interval very short?
Hello
Anyone have issues with "replace key battery" warning appearing rather too often? like every 6 months? Key batteries used to last like several years.
Perhaps lousy lithium battery quality? I am using Eveready.

Thanks.
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Old 09-14-2018, 09:41 AM
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2012 R350 BlueTEC
same here. I use keyless go.
Once replaced battery at dealership, but then bought a pack from Amazon. On the positive side, I noticed that once message "replace key battery" appears, I can still use it for ~2 months.
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Old 09-17-2018, 01:10 PM
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2005 C240 2011 R350
like 2 weeks! I am wondering if the batteries are just not good.
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