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Old Jun 10, 2017 | 08:45 PM
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C63S
Key Battery
Is anyone using 2032 instead of the 2025 battery for their car keys? Mine got a 2032 in it and I think the battery is kind of stuck there.. need some help.

thanks guys!!
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Old Jun 10, 2017 | 10:12 PM
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2023 GLE3502W, 2024 GLC3002W, 1967 Pontiac GTO 4 sp (sold...sniff)
They are the same voltage. The last 2 numbers are the thickness. 25 mm and 32 mm. My '14 ML350 came with 2025.
Last edited by pjw1967; Jun 10, 2017 at 10:22 PM.
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Old Jun 11, 2017 | 12:11 PM
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2017 C43 sedan
I use AA size
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Old Jun 11, 2017 | 12:24 PM
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2015 ML350 BlueTEC 4Matic
My '15 ML350 BT uses the 2025 too.
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Old Jun 11, 2017 | 03:02 PM
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FF. W212 E63 M156 non-pano 18" P2 ParkT NightV (gone but will be missed).
Originally Posted by pjw1967
They are the same voltage. The last 2 numbers are the thickness. 25 mm and 32 mm.
Interesting information! Didn't know that's the only difference! I think you meant 2.5mm and 3.2mm. 25.4mm is 1 inch. So that means 32 has more capacity than 25, right?
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Old Jun 11, 2017 | 03:11 PM
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2023 GLE3502W, 2024 GLC3002W, 1967 Pontiac GTO 4 sp (sold...sniff)
Originally Posted by otakki
Interesting information! Didn't know that's the only difference! I think you meant 2.5mm and 3.2mm. 25.4mm is 1 inch. So that means 32 has more capacity than 25, right?
Yes, I needed a decimal point. I guess batts have an amp/hour rating.
From Google:
The CR2025 is thinner than the CR2032, but they otherwise seem to be interchangeable — assuming you can make them fit your device equally well. The thicker CR2032 is typically rated for 240 mAh whereas the thinner CR2025 is typically rated for 163 mAh.
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Old Jun 11, 2017 | 06:16 PM
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2017 C43 sedan
I put AAs in mine..
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Old Jun 12, 2017 | 03:28 PM
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From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
I put 2032's in my W209 key on Friday and today the Keyless Go wouldn't work; had to insert and turn the key. When my appointment was over I went to start the car and key wouldn't turn! MBUSA said that key batteries "have nothing to do with" the key turning, just locking and unlocking, but after moving the batteries around a bit I was able to get the little red LED to light and, sure enough, the key turned and car started.

You best believe I went straight to the dealership for some free CR2025 batteries and a wash!!
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Old Jun 12, 2017 | 05:02 PM
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'17 C63S
Battery
Batteries will last a lot longer if you put your fobs in a metal tin or an RFID proof bag so the fob isn't constantly trying to communicate with the car.
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