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replace key battery (I did and warning light still on)

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replace key battery (I did and warning light still on)

 
Old 03-04-2017, 09:16 AM
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replace key battery (I did and warning light still on)

Hey everyone.
I just installed a brand new Energizer CR2025 and my "replace key battery" still stays on on my dash. what is going on?

also would the fact that I keep my key always in my ML since I leave it parked inside my garage, would that cause the battery to drain because it is always being detected?

thanks for any input
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Old 03-04-2017, 10:10 AM
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Do you have a second key? Does that error message come with the other key as well OR just with this key?

If I were you, I wouldn't leave the key in the ignition overnight everyday like that... even if the car is secured in the house/garage.
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Old 03-04-2017, 10:13 AM
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usually dealer does it for free?
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Old 03-04-2017, 04:47 PM
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Battery in properly ?
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Old 03-04-2017, 07:59 PM
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When I had problems with my Keyless GO on my W212- I replaced all my batteries with brand new Energizers. The first thing the dealership did was replace the Brand New batteries with Panasonic. They said they sometimes have issues with other brand batteries. I don't understand since Energizer or Duracell should be premium brand batteries.
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Old 03-04-2017, 09:12 PM
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Originally Posted by AkaSigFreak View Post
When I had problems with my Keyless GO on my W212- I replaced all my batteries with brand new Energizers. The first thing the dealership did was replace the Brand New batteries with Panasonic. They said they sometimes have issues with other brand batteries. I don't understand since Energizer or Duracell should be premium brand batteries.

I would do as suggested as well. Panasonic batteries went on back order so we purchased interstate batteries and we had 50 sets of them not work right out of the package. It goes with anything really in the industry MB requests a certain quality to be maintained from what they are purchasing from their vendors which they might not do on their own. Same with companies like apple who outsource their components. Also if it doesn't work you can have service check it out as well since your car is still new I am guessing it maybe be under warranty.
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Old 03-05-2017, 08:35 AM
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update, my key seems to be working fine now. I guess next time I will try and find Panasonic batteries
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Old 03-05-2017, 12:41 PM
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Now that wifey and I both drive a Mercedes- I bought a bunch off of Amazon.
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Old 03-05-2017, 01:17 PM
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Originally Posted by AkaSigFreak View Post
Now that wifey and I both drive a Mercedes- I bought a bunch off of Amazon.
A bunch of Panasonics?
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Old 03-05-2017, 02:02 PM
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Originally Posted by easyedwin View Post
A bunch of Panasonics?
Yes. They were under $10 for 10.
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Old 03-05-2017, 04:27 PM
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I replace our key battery with Energizer brand batteries, and have never had a problem.
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Old 03-05-2017, 05:52 PM
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CR2032 works as well in the key. Slightly thicker but enuff room to fit in my key.
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Old 03-06-2017, 10:23 AM
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All batteries are the same rather its Panasonic or whatever...... It probably the source and age of the battery that's the problem. If you have a volt meter, it should read more than 3V.
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Old 03-06-2017, 03:32 PM
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The Energizers I bought were brand new with an expiration date of 2022. I even had the packages and the receipts.
All batteries are not created equal. Do some research online and brands you would consider "premium" brands are not always the best performers.
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Old 03-07-2017, 12:58 AM
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A gaggle of MB's
Panasonic - even when genuine like MB branded package - are made in Malaysia for the past 6yrs - suck.

Hard to understand - but button cell batteries are one of the largest volum knockoff business - w/China and Indonesia junk being sold as branded battery.

For CR2025 the ONLY Japanese made battery left is Maxell CR2025 - in HOLOGRAM package ONLY !

See 5-pack (less than $.60 ea) and 20-pc pack ($.35 ea) on Amazon below as examples:

Amazon Amazon

Amazon Amazon
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Old 03-07-2017, 09:14 AM
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Originally Posted by AkaSigFreak View Post
The Energizers I bought were brand new with an expiration date of 2022. I even had the packages and the receipts.
All batteries are not created equal. Do some research online and brands you would consider "premium" brands are not always the best performers.

I am using a Duracell battery in my key fob as we speak. I agree, the performance can vary, but when new, as long as they output 3 volt, its fun.
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Old 03-07-2017, 09:41 PM
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Originally Posted by Waykool plantz View Post
CR2032 works as well in the key. Slightly thicker but enuff room to fit in my key.
Do you find it lasts longer than the 2025?
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Old 03-09-2017, 04:20 AM
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Originally Posted by Wewannabenz View Post
Do you find it lasts longer than the 2025?
Haven't had it in long enough...but range seems better
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Old 03-09-2017, 08:05 AM
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Originally Posted by Waykool plantz View Post
Haven't had it in long enough...but range seems better
Thanks, may try the larger battery next time.
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