Mercedes-Benz C-Class key fob battery
GarageDex's key fob data shows the Mercedes-Benz C-Class key fob takes a CR2025 coin cell across the 1998 to 2012 model years.
Shop CR2025 batteries A 2-pack covers both fobs
Key takeaways
- 2009 to 2012 Mercedes-Benz C-Class: CR2025.
- CR2025: 20 mm wide, 2.5 mm thick - thinner than a CR2032, do not swap them.
- Same cell across every listed year.
- Note which side faces up before removing the old cell.
| Years | Fob type | Battery | Notes |
|---|---|---|---|
| 2009 to 2012 | Standard fob | CR2025 | 20 mm wide, 2.5 mm thick - thinner than a CR2032, do not swap them |
| 2001 to 2007 | Standard fob | CR2025 | 2PCS |
| 1998 to 1999 | Standard fob | CR2025 | 2PCS |
How to change the Mercedes-Benz C-Class fob battery
- Slide out the mechanical key if the fob has one, and look for a slot or notch along the seam.
- Twist a coin or a small flat screwdriver in the slot to split the case. Work around the seam rather than forcing one point.
- Note which side of the old cell faces up, then lift it out with a fingernail or plastic pick - avoid metal tools across the contacts.
- Fit the new CR2025 the same way up, snap the halves together, and test the lock button before walking away from the car.
Batteries and tools for the Mercedes-Benz C-Class fob
Coin cells are universal - any brand's CR2025 fits. Buy a multi-pack so the second fob gets a fresh cell too.
CR2025 batteriesName-brand multi-pack, check the date codeShop batteries Plastic pry toolOpens the case without scratching itShop tools Fob coverSilicone case filtered to the Mercedes-Benz C-ClassShop covers
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Same car, other specs: Mercedes-Benz C-Class specs hub and 12V battery size.
Other Mercedes-Benz models
Source: Microbattery - Key Fob Battery Finder. Fob designs change mid-generation, so confirm the code printed on the cell you take out before you order.